treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 485

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation this program is
  distributed in the hope that it would be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 1 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/20190604081204.982710800@linutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/testing/selftests/vm/va_128TBswitch.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *
  * Authors: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
  * Authors: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
-
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
  */
 
 #include <stdio.h>