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/isee/igep003x/Makefile b/board/isee/igep003x/Makefile
index fc985b4..c3e3974 100644
--- a/board/isee/igep003x/Makefile
+++ b/board/isee/igep003x/Makefile
@@ -1,10 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Makefile
 #
 # Copyright (C) 2013, ISEE 2007 SL - http://www.isee.biz/
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 ifdef CONFIG_SPL_BUILD
 obj-y	+= mux.o
diff --git a/board/isee/igep003x/board.c b/board/isee/igep003x/board.c
index d33dc96..cc55bcc 100644
--- a/board/isee/igep003x/board.c
+++ b/board/isee/igep003x/board.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Board functions for IGEP COM AQUILA and SMARC AM335x based boards
  *
  * Copyright (C) 2013-2017, ISEE 2007 SL - http://www.isee.biz/
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/isee/igep003x/board.h b/board/isee/igep003x/board.h
index a11d7ab..ec54f86 100644
--- a/board/isee/igep003x/board.h
+++ b/board/isee/igep003x/board.h
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * IGEP COM AQUILA boards information header
  *
  * Copyright (C) 2013, ISEE 2007 SL - http://www.isee.biz/
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _BOARD_H_
diff --git a/board/isee/igep00x0/Makefile b/board/isee/igep00x0/Makefile
index 74594da..e095bca 100644
--- a/board/isee/igep00x0/Makefile
+++ b/board/isee/igep00x0/Makefile
@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2000, 2001, 2002
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 ifdef CONFIG_SPL_BUILD
 obj-y	:= spl.o common.o
diff --git a/board/isee/igep00x0/common.c b/board/isee/igep00x0/common.c
index d35afa5..f5d62ff 100644
--- a/board/isee/igep00x0/common.c
+++ b/board/isee/igep00x0/common.c
@@ -1,6 +1,5 @@
-/*
- * SPDX-License-Identifier:	GPL-2.0+
- */
+// SPDX-License-Identifier: GPL-2.0+
+
 #include <common.h>
 #include <twl4030.h>
 #include <asm/io.h>
diff --git a/board/isee/igep00x0/igep00x0.c b/board/isee/igep00x0/igep00x0.c
index 01bb99f..45a414c 100644
--- a/board/isee/igep00x0/igep00x0.c
+++ b/board/isee/igep00x0/igep00x0.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2010
  * ISEE 2007 SL, <www.iseebcn.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 #include <common.h>
 #include <status_led.h>
diff --git a/board/isee/igep00x0/igep00x0.h b/board/isee/igep00x0/igep00x0.h
index 1cbe7c9..aa532ac 100644
--- a/board/isee/igep00x0/igep00x0.h
+++ b/board/isee/igep00x0/igep00x0.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * (C) Copyright 2010
  * ISEE 2007 SL, <www.iseebcn.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 #ifndef _IGEP00X0_H_
 #define _IGEP00X0_H_
diff --git a/board/isee/igep00x0/spl.c b/board/isee/igep00x0/spl.c
index f1c99dd..e092e1a 100644
--- a/board/isee/igep00x0/spl.c
+++ b/board/isee/igep00x0/spl.c
@@ -1,6 +1,5 @@
-/*
- * SPDX-License-Identifier:	GPL-2.0+
- */
+// SPDX-License-Identifier: GPL-2.0+
+
 #include <asm/io.h>
 #include <asm/arch/mem.h>
 #include <asm/arch/sys_proto.h>