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/buffalo/lsxl/Makefile b/board/buffalo/lsxl/Makefile
index 1b01b40..60babb0 100644
--- a/board/buffalo/lsxl/Makefile
+++ b/board/buffalo/lsxl/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2012 Michael Walle
 # Michael Walle <michael@walle.cc>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y	:= lsxl.o
diff --git a/board/buffalo/lsxl/kwbimage-lschl.cfg b/board/buffalo/lsxl/kwbimage-lschl.cfg
index 5fc122f..4493307 100644
--- a/board/buffalo/lsxl/kwbimage-lschl.cfg
+++ b/board/buffalo/lsxl/kwbimage-lschl.cfg
@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2012 Michael Walle
 # Michael Walle <michael@walle.cc>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 # Refer doc/README.kwbimage for more details about how-to configure
 # and create kirkwood boot image
 #
diff --git a/board/buffalo/lsxl/kwbimage-lsxhl.cfg b/board/buffalo/lsxl/kwbimage-lsxhl.cfg
index 80e2c02..4335a66 100644
--- a/board/buffalo/lsxl/kwbimage-lsxhl.cfg
+++ b/board/buffalo/lsxl/kwbimage-lsxhl.cfg
@@ -1,9 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2012 Michael Walle
 # Michael Walle <michael@walle.cc>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 # Refer doc/README.kwbimage for more details about how-to configure
 # and create kirkwood boot image
 #
diff --git a/board/buffalo/lsxl/lsxl.c b/board/buffalo/lsxl/lsxl.c
index 8ae4207..bf69a74 100644
--- a/board/buffalo/lsxl/lsxl.c
+++ b/board/buffalo/lsxl/lsxl.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2012 Michael Walle
  * Michael Walle <michael@walle.cc>
  *
  * Based on sheevaplug/sheevaplug.c by
  *   Marvell Semiconductor <www.marvell.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/board/buffalo/lsxl/lsxl.h b/board/buffalo/lsxl/lsxl.h
index d5e79ac..8ff3f2f 100644
--- a/board/buffalo/lsxl/lsxl.h
+++ b/board/buffalo/lsxl/lsxl.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (c) 2012 Michael Walle
  * Michael Walle <michael@walle.cc>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __LSXL_H