SPDX: Convert all of our single license tags to Linux Kernel style

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/st/stih410-b2260/Makefile b/board/st/stih410-b2260/Makefile
index 8293ae9..dc3e1d3 100644
--- a/board/st/stih410-b2260/Makefile
+++ b/board/st/stih410-b2260/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2017, STMicroelectronics - All Rights Reserved
 # Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	= board.o
diff --git a/board/st/stih410-b2260/board.c b/board/st/stih410-b2260/board.c
index fe639dc..b4fc8f3 100644
--- a/board/st/stih410-b2260/board.c
+++ b/board/st/stih410-b2260/board.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
  * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stm32f429-discovery/Makefile b/board/st/stm32f429-discovery/Makefile
index d94059d..6b02c0f 100644
--- a/board/st/stm32f429-discovery/Makefile
+++ b/board/st/stm32f429-discovery/Makefile
@@ -1,12 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2000-2004
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 #
 # (C) Copyright 2015
 # Kamil Lulko, <kamil.lulko@gmail.com>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= stm32f429-discovery.o
 obj-y	+= led.o
diff --git a/board/st/stm32f429-discovery/led.c b/board/st/stm32f429-discovery/led.c
index ee22009..8320ad4 100644
--- a/board/st/stm32f429-discovery/led.c
+++ b/board/st/stm32f429-discovery/led.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2015
  * Kamil Lulko, <kamil.lulko@gmail.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stm32f429-discovery/stm32f429-discovery.c b/board/st/stm32f429-discovery/stm32f429-discovery.c
index 3d90218..b7638c0 100644
--- a/board/st/stm32f429-discovery/stm32f429-discovery.c
+++ b/board/st/stm32f429-discovery/stm32f429-discovery.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2011, 2012, 2013
  * Yuri Tikhonov, Emcraft Systems, yur@emcraft.com
@@ -7,8 +8,6 @@
  *
  * (C) Copyright 2015
  * Kamil Lulko, <kamil.lulko@gmail.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stm32f429-evaluation/Makefile b/board/st/stm32f429-evaluation/Makefile
index 3efba3a..8bf9e1f 100644
--- a/board/st/stm32f429-evaluation/Makefile
+++ b/board/st/stm32f429-evaluation/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2018, STMicroelectronics - All Rights Reserved
 # Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= stm32f429-evaluation.o
diff --git a/board/st/stm32f429-evaluation/stm32f429-evaluation.c b/board/st/stm32f429-evaluation/stm32f429-evaluation.c
index 25e0207..2e638c6 100644
--- a/board/st/stm32f429-evaluation/stm32f429-evaluation.c
+++ b/board/st/stm32f429-evaluation/stm32f429-evaluation.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
  * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stm32f469-discovery/Makefile b/board/st/stm32f469-discovery/Makefile
index 9ecd61e..249835b 100644
--- a/board/st/stm32f469-discovery/Makefile
+++ b/board/st/stm32f469-discovery/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) STMicroelectronics SA 2017
 # Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= stm32f469-discovery.o
diff --git a/board/st/stm32f469-discovery/stm32f469-discovery.c b/board/st/stm32f469-discovery/stm32f469-discovery.c
index 36f7b2e..90d7045 100644
--- a/board/st/stm32f469-discovery/stm32f469-discovery.c
+++ b/board/st/stm32f469-discovery/stm32f469-discovery.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) STMicroelectronics SA 2017
  * Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stm32f746-disco/Makefile b/board/st/stm32f746-disco/Makefile
index 00b072b..369f17a 100644
--- a/board/st/stm32f746-disco/Makefile
+++ b/board/st/stm32f746-disco/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2016, STMicroelectronics - All Rights Reserved
 # Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= stm32f746-disco.o
diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c
index c4f2633..e21cfc6 100644
--- a/board/st/stm32f746-disco/stm32f746-disco.c
+++ b/board/st/stm32f746-disco/stm32f746-disco.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stm32h743-disco/Makefile b/board/st/stm32h743-disco/Makefile
index 8c313b2..8fe7a2d 100644
--- a/board/st/stm32h743-disco/Makefile
+++ b/board/st/stm32h743-disco/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2017, STMicroelectronics - All Rights Reserved
 # Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= stm32h743-disco.o
diff --git a/board/st/stm32h743-disco/stm32h743-disco.c b/board/st/stm32h743-disco/stm32h743-disco.c
index 226b704..fa007c7 100644
--- a/board/st/stm32h743-disco/stm32h743-disco.c
+++ b/board/st/stm32h743-disco/stm32h743-disco.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
  * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stm32h743-eval/Makefile b/board/st/stm32h743-eval/Makefile
index 5482e9d..88b59fd 100644
--- a/board/st/stm32h743-eval/Makefile
+++ b/board/st/stm32h743-eval/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2017, STMicroelectronics - All Rights Reserved
 # Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= stm32h743-eval.o
diff --git a/board/st/stm32h743-eval/stm32h743-eval.c b/board/st/stm32h743-eval/stm32h743-eval.c
index 226b704..fa007c7 100644
--- a/board/st/stm32h743-eval/stm32h743-eval.c
+++ b/board/st/stm32h743-eval/stm32h743-eval.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
  * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/st/stv0991/Makefile b/board/st/stv0991/Makefile
index 6fb4135..7f6d719 100644
--- a/board/st/stv0991/Makefile
+++ b/board/st/stv0991/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2014, STMicroelectronics - All Rights Reserved
 # Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= stv0991.o
diff --git a/board/st/stv0991/stv0991.c b/board/st/stv0991/stv0991.c
index 670d59c..33b29e6 100644
--- a/board/st/stv0991/stv0991.c
+++ b/board/st/stv0991/stv0991.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>