treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 10

Based on 1 normalized pattern(s):

  licensed under the fsf s gnu public license v2 or later

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 2 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190519154041.526489261@linutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/plist.h

+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Descending-priority-sorted double-linked list
  *
@@ -12,8 +13,6 @@
  * Simplifications of the original code by
  * Oleg Nesterov <oleg@tv-sign.ru>
  *
- * Licensed under the FSF's GNU Public License v2 or later.
- *
  * Based on simple lists (include/linux/list.h).
  *
  * This is a priority-sorted list of nodes; each node has a
@@ -70,7 +69,6 @@
  * is lowest priority.
  *
  * No locking is done, up to the caller.
- *
  */
 #ifndef _LINUX_PLIST_H_
 #define _LINUX_PLIST_H_

lib/plist.c

+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * lib/plist.c
  *
@@ -14,8 +15,6 @@
  * Simplifications of the original code by
  * Oleg Nesterov <oleg@tv-sign.ru>
  *
- * Licensed under the FSF's GNU Public License v2 or later.
- *
  * Based on simple lists (include/linux/list.h).
  *
  * This file contains the add / del functions which are considered to