treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 456

Based on 1 normalized pattern(s):

  driver 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 the [audiowerk2] [alsa]
  driver is distributed in the hope that it will be useful but without
  any warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with the [audiowerk2] [alsa] driver if not
  write to the free software foundation inc 51 franklin street fifth
  floor boston ma 02110 1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 5 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081201.505559553@linutronix.de


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