treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482

Based on 1 normalized pattern(s):

  this work is licensed under the terms of the gnu gpl version 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 48 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Enrico Weigelt <info@metux.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081204.624030236@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

mm/ksm.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Memory merging support.
  *
@@ -10,8 +11,6 @@
  *	Andrea Arcangeli
  *	Chris Wright
  *	Hugh Dickins
- *
- * This work is licensed under the terms of the GNU GPL, version 2.
  */
 
 #include <linux/errno.h>