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-tegra/tegra30/Makefile b/arch/arm/mach-tegra/tegra30/Makefile
index d3d3b6e..9f17057 100644
--- a/arch/arm/mach-tegra/tegra30/Makefile
+++ b/arch/arm/mach-tegra/tegra30/Makefile
@@ -1,8 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
-#
-# SPDX-License-Identifier:	GPL-2.0
-#
 
 obj-$(CONFIG_SPL_BUILD) += cpu.o
 
diff --git a/arch/arm/mach-tegra/tegra30/clock.c b/arch/arm/mach-tegra/tegra30/clock.c
index 282f34f..dd1193b 100644
--- a/arch/arm/mach-tegra/tegra30/clock.c
+++ b/arch/arm/mach-tegra/tegra30/clock.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2010-2015
  * NVIDIA Corporation <www.nvidia.com>
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 /* Tegra30 Clock control functions */
diff --git a/arch/arm/mach-tegra/tegra30/cpu.c b/arch/arm/mach-tegra/tegra30/cpu.c
index 66b021b..45a5c09 100644
--- a/arch/arm/mach-tegra/tegra30/cpu.c
+++ b/arch/arm/mach-tegra/tegra30/cpu.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2010-2014, NVIDIA CORPORATION.  All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0
  */
 
 #include <common.h>
diff --git a/arch/arm/mach-tegra/tegra30/funcmux.c b/arch/arm/mach-tegra/tegra30/funcmux.c
index 8c68339..b3de980 100644
--- a/arch/arm/mach-tegra/tegra30/funcmux.c
+++ b/arch/arm/mach-tegra/tegra30/funcmux.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0
  */
 
 /* Tegra30 high-level function multiplexing */
diff --git a/arch/arm/mach-tegra/tegra30/pinmux.c b/arch/arm/mach-tegra/tegra30/pinmux.c
index 7eb0574..d11b2aa 100644
--- a/arch/arm/mach-tegra/tegra30/pinmux.c
+++ b/arch/arm/mach-tegra/tegra30/pinmux.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2010-2014, NVIDIA CORPORATION. All rights reserved.
- *
- * SPDX-License-Identifier: GPL-2.0+
  */
 
 #include <common.h>