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/arm/mach-uniphier/sbc/Makefile b/arch/arm/mach-uniphier/sbc/Makefile
index fe9d85a..912e05a 100644
--- a/arch/arm/mach-uniphier/sbc/Makefile
+++ b/arch/arm/mach-uniphier/sbc/Makefile
@@ -1,6 +1,4 @@
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
+# SPDX-License-Identifier: GPL-2.0+
 
 obj-y					+= sbc.o
 
diff --git a/arch/arm/mach-uniphier/sbc/sbc-ld11.c b/arch/arm/mach-uniphier/sbc/sbc-ld11.c
index d075c47..44d8a1e 100644
--- a/arch/arm/mach-uniphier/sbc/sbc-ld11.c
+++ b/arch/arm/mach-uniphier/sbc/sbc-ld11.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016-2017 Socionext Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
diff --git a/arch/arm/mach-uniphier/sbc/sbc-ld4.c b/arch/arm/mach-uniphier/sbc/sbc-ld4.c
index 24a55ea..d08b571 100644
--- a/arch/arm/mach-uniphier/sbc/sbc-ld4.c
+++ b/arch/arm/mach-uniphier/sbc/sbc-ld4.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2011-2015 Panasonic Corporation
  * Copyright (C) 2015-2017 Socionext Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <linux/io.h>
diff --git a/arch/arm/mach-uniphier/sbc/sbc-pxs2.c b/arch/arm/mach-uniphier/sbc/sbc-pxs2.c
index 9ee2646..8c167ef 100644
--- a/arch/arm/mach-uniphier/sbc/sbc-pxs2.c
+++ b/arch/arm/mach-uniphier/sbc/sbc-pxs2.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016-2017 Socionext Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <linux/io.h>
diff --git a/arch/arm/mach-uniphier/sbc/sbc-regs.h b/arch/arm/mach-uniphier/sbc/sbc-regs.h
index 673fb75..853015a 100644
--- a/arch/arm/mach-uniphier/sbc/sbc-regs.h
+++ b/arch/arm/mach-uniphier/sbc/sbc-regs.h
@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * UniPhier SBC (System Bus Controller) registers
  *
  * Copyright (C) 2011-2014 Panasonic Corporation
  * Copyright (C) 2015-2016 Socionext Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef ARCH_SBC_REGS_H
diff --git a/arch/arm/mach-uniphier/sbc/sbc.c b/arch/arm/mach-uniphier/sbc/sbc.c
index c09d890..df01e5c 100644
--- a/arch/arm/mach-uniphier/sbc/sbc.c
+++ b/arch/arm/mach-uniphier/sbc/sbc.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2011-2015 Panasonic Corporation
  * Copyright (C) 2015-2017 Socionext Inc.
  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <linux/io.h>