treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 318

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 as is without any warranty of any kind whether expressed
  or implied without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  version 2 for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 20 file(s).

Bucket: ASIS-1

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

20 files changed