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>

.travis.yml

+# SPDX-License-Identifier: GPL-2.0+
 # Copyright Roger Meier <r.meier@siemens.com>
-# SPDX-License-Identifier:	GPL-2.0+
 
 # build U-Boot on Travis CI - https://travis-ci.org/
 

Makefile

-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
+# SPDX-License-Identifier: GPL-2.0+
 
 VERSION = 2018
 PATCHLEVEL = 05

README

+# SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2000 - 2013
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 Summary:
 ========

api/Makefile

+# SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2007 Semihalf
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y += api.o api_display.o api_net.o api_storage.o
 obj-$(CONFIG_ARM) += api_platform-arm.o

api/api.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2007 Semihalf
  *
  * Written by: Rafal Jaworowski <raj@semihalf.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <config.h>

api/api_display.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2011 The Chromium OS Authors.
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>

api/api_net.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2007 Semihalf
  *
  * Written by: Rafal Jaworowski <raj@semihalf.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <config.h>

api/api_platform-arm.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2007 Semihalf
  *
  * Written by: Rafal Jaworowski <raj@semihalf.com>
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  * This file contains routines that fetch data from ARM-dependent sources
  * (bd_info etc.)
  */

api/api_platform-mips.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2007 Stanislav Galabov <sgalabov@gmail.com>
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  * This file contains routines that fetch data from bd_info sources
  */
 

api/api_platform-powerpc.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2007 Semihalf
  *
  * Written by: Rafal Jaworowski <raj@semihalf.com>
  *
- * SPDX-License-Identifier:	GPL-2.0+
- *
  * This file contains routines that fetch data from PowerPC-dependent sources
  * (bd_info etc.)
  */

api/api_private.h

+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * (C) Copyright 2007 Semihalf
  *
  * Written by: Rafal Jaworowski <raj@semihalf.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _API_PRIVATE_H_

api/api_storage.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2007-2008 Semihalf
  *
  * Written by: Rafal Jaworowski <raj@semihalf.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <config.h>

arch/arc/Makefile

-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
+# SPDX-License-Identifier: GPL-2.0+
 
 libs-y += arch/arc/cpu/$(CPU)/
 libs-y += arch/arc/lib/

arch/arc/config.mk

+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 ifndef CONFIG_CPU_BIG_ENDIAN
 CONFIG_SYS_LITTLE_ENDIAN = 1

arch/arc/cpu/arcv1/Makefile

+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y += ivt.o

arch/arc/cpu/arcv1/ivt.S

+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 .section .ivt, "ax",@progbits

arch/arc/cpu/arcv2/Makefile

+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y += ivt.o

arch/arc/cpu/arcv2/ivt.S

+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 .section .ivt, "a",@progbits

arch/arc/cpu/u-boot.lds

+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <config.h>

arch/arc/dts/Makefile

-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
+# SPDX-License-Identifier: GPL-2.0+
 
 dtb-$(CONFIG_TARGET_AXS101) +=  axs101.dtb
 dtb-$(CONFIG_TARGET_AXS103) +=  axs103.dtb

arch/arc/dts/abilis_tb100.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /dts-v1/;