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/arch/powerpc/cpu/mpc8xxx/Makefile b/arch/powerpc/cpu/mpc8xxx/Makefile
index c5592cd..bec891d 100644
--- a/arch/powerpc/cpu/mpc8xxx/Makefile
+++ b/arch/powerpc/cpu/mpc8xxx/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Copyright 2009-2010 Freescale Semiconductor, Inc.
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 MINIMAL=
 
diff --git a/arch/powerpc/cpu/mpc8xxx/cpu.c b/arch/powerpc/cpu/mpc8xxx/cpu.c
index afb5b51..467eac4 100644
--- a/arch/powerpc/cpu/mpc8xxx/cpu.c
+++ b/arch/powerpc/cpu/mpc8xxx/cpu.c
@@ -1,10 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2009-2012 Freescale Semiconductor, Inc.
  *
  * This file is derived from arch/powerpc/cpu/mpc85xx/cpu.c and
  * arch/powerpc/cpu/mpc86xx/cpu.c. Basically this file contains
  * cpu specific common code for 85xx/86xx processors.
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <config.h>
diff --git a/arch/powerpc/cpu/mpc8xxx/fdt.c b/arch/powerpc/cpu/mpc8xxx/fdt.c
index 1f928bd..0d877c4 100644
--- a/arch/powerpc/cpu/mpc8xxx/fdt.c
+++ b/arch/powerpc/cpu/mpc8xxx/fdt.c
@@ -1,10 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2009-2014 Freescale Semiconductor, Inc.
  *
  * This file is derived from arch/powerpc/cpu/mpc85xx/cpu.c and
  * arch/powerpc/cpu/mpc86xx/cpu.c. Basically this file contains
  * cpu specific common code for 85xx/86xx processors.
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
index 728a351..13545fc 100644
--- a/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
+++ b/arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2010-2011 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0
  */
 
 #include <common.h>
diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_pamu.c b/arch/powerpc/cpu/mpc8xxx/fsl_pamu.c
index ede8e66..23cc5a3 100644
--- a/arch/powerpc/cpu/mpc8xxx/fsl_pamu.c
+++ b/arch/powerpc/cpu/mpc8xxx/fsl_pamu.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * FSL PAMU driver
  *
  * Copyright 2012-2016 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/arch/powerpc/cpu/mpc8xxx/law.c b/arch/powerpc/cpu/mpc8xxx/law.c
index bd79297..30f35e2 100644
--- a/arch/powerpc/cpu/mpc8xxx/law.c
+++ b/arch/powerpc/cpu/mpc8xxx/law.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2008-2011 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/arch/powerpc/cpu/mpc8xxx/pamu_table.c b/arch/powerpc/cpu/mpc8xxx/pamu_table.c
index a8e6f51..7b4690a 100644
--- a/arch/powerpc/cpu/mpc8xxx/pamu_table.c
+++ b/arch/powerpc/cpu/mpc8xxx/pamu_table.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2012-2016 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/arch/powerpc/cpu/mpc8xxx/srio.c b/arch/powerpc/cpu/mpc8xxx/srio.c
index e17e201..ea7dac6 100644
--- a/arch/powerpc/cpu/mpc8xxx/srio.c
+++ b/arch/powerpc/cpu/mpc8xxx/srio.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2011 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>