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/freescale/bsc9131rdb/Makefile b/board/freescale/bsc9131rdb/Makefile
index 8027750..063db44 100644
--- a/board/freescale/bsc9131rdb/Makefile
+++ b/board/freescale/bsc9131rdb/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright 2011-2012 Freescale Semiconductor, Inc.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 MINIMAL=
 
diff --git a/board/freescale/bsc9131rdb/bsc9131rdb.c b/board/freescale/bsc9131rdb/bsc9131rdb.c
index 9b10576..367152f 100644
--- a/board/freescale/bsc9131rdb/bsc9131rdb.c
+++ b/board/freescale/bsc9131rdb/bsc9131rdb.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2011-2012 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/freescale/bsc9131rdb/ddr.c b/board/freescale/bsc9131rdb/ddr.c
index 2a5e61e..f9f8d80 100644
--- a/board/freescale/bsc9131rdb/ddr.c
+++ b/board/freescale/bsc9131rdb/ddr.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2011-2012 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/freescale/bsc9131rdb/law.c b/board/freescale/bsc9131rdb/law.c
index 19b7430..ccfe4a2 100644
--- a/board/freescale/bsc9131rdb/law.c
+++ b/board/freescale/bsc9131rdb/law.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2011-2012 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/freescale/bsc9131rdb/spl_minimal.c b/board/freescale/bsc9131rdb/spl_minimal.c
index bd8560b..e7ed0a9 100644
--- a/board/freescale/bsc9131rdb/spl_minimal.c
+++ b/board/freescale/bsc9131rdb/spl_minimal.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2013 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/freescale/bsc9131rdb/tlb.c b/board/freescale/bsc9131rdb/tlb.c
index e5dab9e..e1aacf0 100644
--- a/board/freescale/bsc9131rdb/tlb.c
+++ b/board/freescale/bsc9131rdb/tlb.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2011-2012 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>