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/include/asm/arch-mx7/clock.h b/arch/arm/include/asm/arch-mx7/clock.h
index 3b115ad..f56564e 100644
--- a/arch/arm/include/asm/arch-mx7/clock.h
+++ b/arch/arm/include/asm/arch-mx7/clock.h
@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
  *
  * Author:
  *	Peng Fan <Peng.Fan@freescale.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _ASM_ARCH_CLOCK_H
diff --git a/arch/arm/include/asm/arch-mx7/clock_slice.h b/arch/arm/include/asm/arch-mx7/clock_slice.h
index 6ede0cd..9a7c1f8 100644
--- a/arch/arm/include/asm/arch-mx7/clock_slice.h
+++ b/arch/arm/include/asm/arch-mx7/clock_slice.h
@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
  *
  * Author:
  *	Peng Fan <Peng.Fan@freescale.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _ASM_ARCH_CLOCK_SLICE_H
diff --git a/arch/arm/include/asm/arch-mx7/crm_regs.h b/arch/arm/include/asm/arch-mx7/crm_regs.h
index 611190e..f3515fa 100644
--- a/arch/arm/include/asm/arch-mx7/crm_regs.h
+++ b/arch/arm/include/asm/arch-mx7/crm_regs.h
@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
  *
  * Author:
  *	Peng Fan <Peng.Fan@freescale.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __ARCH_ARM_MACH_MX7_CCM_REGS_H__
diff --git a/arch/arm/include/asm/arch-mx7/gpio.h b/arch/arm/include/asm/arch-mx7/gpio.h
index af57bb9..1da66a4 100644
--- a/arch/arm/include/asm/arch-mx7/gpio.h
+++ b/arch/arm/include/asm/arch-mx7/gpio.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __ASM_ARCH_MX7_GPIO_H
diff --git a/arch/arm/include/asm/arch-mx7/imx-rdc.h b/arch/arm/include/asm/arch-mx7/imx-rdc.h
index dbeed56..3512ddb 100644
--- a/arch/arm/include/asm/arch-mx7/imx-rdc.h
+++ b/arch/arm/include/asm/arch-mx7/imx-rdc.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2016 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:  GPL-2.0+
  */
 
 #ifndef __IMX_RDC_H__
diff --git a/arch/arm/include/asm/arch-mx7/imx-regs.h b/arch/arm/include/asm/arch-mx7/imx-regs.h
index 0cdb508..6336514 100644
--- a/arch/arm/include/asm/arch-mx7/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx7/imx-regs.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor, Inc. All Rights Reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __ASM_ARCH_MX7_IMX_REGS_H__
diff --git a/arch/arm/include/asm/arch-mx7/mx7-ddr.h b/arch/arm/include/asm/arch-mx7/mx7-ddr.h
index 3a4841c..3c07904 100644
--- a/arch/arm/include/asm/arch-mx7/mx7-ddr.h
+++ b/arch/arm/include/asm/arch-mx7/mx7-ddr.h
@@ -1,11 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * DDR controller registers of the i.MX7 architecture
  *
  * (C) Copyright 2017 CompuLab, Ltd. http://www.compulab.com
  *
  * Author: Uri Mashiach <uri.mashiach@compulab.co.il>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __ASM_ARCH_MX7_DDR_H__
diff --git a/arch/arm/include/asm/arch-mx7/mx7-pins.h b/arch/arm/include/asm/arch-mx7/mx7-pins.h
index 9df81f7..bc99a86 100644
--- a/arch/arm/include/asm/arch-mx7/mx7-pins.h
+++ b/arch/arm/include/asm/arch-mx7/mx7-pins.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 #ifndef __ASM_ARCH_MX7_PINS_H__
 #define __ASM_ARCH_MX7_PINS_H__
diff --git a/arch/arm/include/asm/arch-mx7/mx7_plugin.S b/arch/arm/include/asm/arch-mx7/mx7_plugin.S
index 41336b4..c7a84e8 100644
--- a/arch/arm/include/asm/arch-mx7/mx7_plugin.S
+++ b/arch/arm/include/asm/arch-mx7/mx7_plugin.S
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2016 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <config.h>
diff --git a/arch/arm/include/asm/arch-mx7/mx7d_pins.h b/arch/arm/include/asm/arch-mx7/mx7d_pins.h
index 7e926d1..d54680f 100644
--- a/arch/arm/include/asm/arch-mx7/mx7d_pins.h
+++ b/arch/arm/include/asm/arch-mx7/mx7d_pins.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #ifndef __ASM_ARCH_IMX7D_PINS_H__
diff --git a/arch/arm/include/asm/arch-mx7/mx7d_rdc.h b/arch/arm/include/asm/arch-mx7/mx7d_rdc.h
index 9073cbd..2ea175c 100644
--- a/arch/arm/include/asm/arch-mx7/mx7d_rdc.h
+++ b/arch/arm/include/asm/arch-mx7/mx7d_rdc.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2016 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:  GPL-2.0+
  */
 
 #ifndef __MX7D_RDC_H__
diff --git a/arch/arm/include/asm/arch-mx7/sys_proto.h b/arch/arm/include/asm/arch-mx7/sys_proto.h
index cd83662..e46a021 100644
--- a/arch/arm/include/asm/arch-mx7/sys_proto.h
+++ b/arch/arm/include/asm/arch-mx7/sys_proto.h
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 #ifndef __SYS_PROTO_IMX7_
 #define __SYS_PROTO_IMX7_