treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 389

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 v2 as published
  by the free software foundation

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 2 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Armijn Hemel <armijn@tjaldur.nl>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531081037.837563564@linutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

net/dccp/qpolicy.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  net/dccp/qpolicy.c
  *
  *  Policy-based packet dequeueing interface for DCCP.
  *
  *  Copyright (c) 2008 Tomasz Grobelny <tomasz@grobelny.oswiecenia.net>
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License v2
- *  as published by the Free Software Foundation.
  */
 #include "dccp.h"
 

net/dccp/sysctl.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  net/dccp/sysctl.c
  *
  *  An implementation of the DCCP protocol
  *  Arnaldo Carvalho de Melo <acme@mandriva.com>
- *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License v2
- *	as published by the Free Software Foundation.
  */
 
 #include <linux/mm.h>