treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 62

Based on 1 normalized pattern(s):

  released under the gpl version 2 or later

and 1 additional 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 either version
  2 of the license or at your option 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: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520071858.828691433@linutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

net/unix/garbage.c

+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * NET3:	Garbage Collector For AF_UNIX sockets
  *
  * Garbage Collector:
  *	Copyright (C) Barak A. Pearlmutter.
- *	Released under the GPL version 2 or later.
  *
  * Chopped about by Alan Cox 22/3/96 to make it fit the AF_UNIX socket problem.
  * If it doesn't work blame me, it worked when Barak sent it.
@@ -24,11 +24,6 @@
  *
  *  - don't just push entire root set; process in place
  *
- *	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; either version
- *	2 of the License, or (at your option) any later version.
- *
  *  Fixes:
  *	Alan Cox	07 Sept	1997	Vmalloc internal stack as needed.
  *					Cope with changing max_files.