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/fs/reiserfs/Makefile b/fs/reiserfs/Makefile
index 5a692f0..63dd895 100644
--- a/fs/reiserfs/Makefile
+++ b/fs/reiserfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # (C) Copyright 2006
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -5,8 +6,5 @@
 # (C) Copyright 2003
 # Pavel Bartusek, Sysgo Real-Time Solutions AG, pba@sysgo.de
 #
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
 
 obj-y := reiserfs.o dev.o mode_string.o
diff --git a/fs/reiserfs/dev.c b/fs/reiserfs/dev.c
index 7b786e4..c6b6779 100644
--- a/fs/reiserfs/dev.c
+++ b/fs/reiserfs/dev.c
@@ -1,8 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  (C) Copyright 2003 - 2004
  *  Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 
diff --git a/fs/reiserfs/mode_string.c b/fs/reiserfs/mode_string.c
index ec18dc1..638cf63 100644
--- a/fs/reiserfs/mode_string.c
+++ b/fs/reiserfs/mode_string.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * mode_string implementation for busybox
  *
  * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* Aug 13, 2003
diff --git a/fs/reiserfs/reiserfs.c b/fs/reiserfs/reiserfs.c
index 1d6fa08..635aab2 100644
--- a/fs/reiserfs/reiserfs.c
+++ b/fs/reiserfs/reiserfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Copyright 2000-2002 by Hans Reiser, licensing governed by reiserfs/README
  *
@@ -7,8 +8,6 @@
  *  (C) Copyright 2003 - 2004
  *  Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
  *
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* An implementation for the ReiserFS filesystem ported from GRUB.
diff --git a/fs/reiserfs/reiserfs_private.h b/fs/reiserfs/reiserfs_private.h
index 9d14c71..c8867e2 100644
--- a/fs/reiserfs/reiserfs_private.h
+++ b/fs/reiserfs/reiserfs_private.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  *  Copyright 2000-2002 by Hans Reiser, licensing governed by reiserfs/README
  *
@@ -7,8 +8,6 @@
  *  (C) Copyright 2003 - 2004
  *  Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
  *
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* An implementation for the ReiserFS filesystem ported from GRUB.