treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 86

Based on 1 normalized pattern(s):

  this source code is public free you can distribute it and or modify
  it under terms of the gnu general public license published by the
  free software foundation either version two of this license or any
  later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520075211.593137457@linutronix.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>