treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 304

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 as published by
  the free software foundation version 2 this program is distributed
  as is without any warranty of any kind whether express or implied
  without even the implied warranty of merchantability or fitness for
  a particular purpose see the gnu general public license 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 163 file(s).

Bucket: ASIS-1

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

163 files changed