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-stv0991/gpio.h b/arch/arm/include/asm/arch-stv0991/gpio.h
index f66fa60..b27f407 100644
--- a/arch/arm/include/asm/arch-stv0991/gpio.h
+++ b/arch/arm/include/asm/arch-stv0991/gpio.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __ASM_ARCH_STV0991_GPIO_H
diff --git a/arch/arm/include/asm/arch-stv0991/hardware.h b/arch/arm/include/asm/arch-stv0991/hardware.h
index 13b682d..ea8f820 100644
--- a/arch/arm/include/asm/arch-stv0991/hardware.h
+++ b/arch/arm/include/asm/arch-stv0991/hardware.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _ASM_ARCH_HARDWARE_H
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h b/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h
index 45f3c90..df9dd54 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_cgu.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _STV0991_CGU_H
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_creg.h b/arch/arm/include/asm/arch-stv0991/stv0991_creg.h
index 2c279b1..4d444a6 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_creg.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_creg.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _STV0991_CREG_H
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_defs.h b/arch/arm/include/asm/arch-stv0991/stv0991_defs.h
index 7f0f1d6..97d28b2 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_defs.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_defs.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __STV0991_DEFS_H__
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_gpt.h b/arch/arm/include/asm/arch-stv0991/stv0991_gpt.h
index 0a1b6de..cd27472 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_gpt.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_gpt.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _STV0991_GPT_H
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_periph.h b/arch/arm/include/asm/arch-stv0991/stv0991_periph.h
index a599ade..7a50be1 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_periph.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_periph.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef __ASM_ARM_ARCH_PERIPH_H
diff --git a/arch/arm/include/asm/arch-stv0991/stv0991_wdru.h b/arch/arm/include/asm/arch-stv0991/stv0991_wdru.h
index 2e89ebc..8cb8a8a 100644
--- a/arch/arm/include/asm/arch-stv0991/stv0991_wdru.h
+++ b/arch/arm/include/asm/arch-stv0991/stv0991_wdru.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2014, STMicroelectronics - All Rights Reserved
  * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #ifndef _STV0991_WD_RST_H