treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 207

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of version 2 of the gnu general public license 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 1 file(s).
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NAlexios Zavras <alexios.zavras@intel.com>
Reviewed-by: NSteve Winslow <swinslow@gmail.com>
Reviewed-by: NRichard Fontana <rfontana@redhat.com>
Reviewed-by: NAllison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528171438.709316650@linutronix.deSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/soc/ixp4xx/ixp4xx-npe.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Intel IXP4xx Network Processor Engine driver for Linux
  *
  * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- *
  * The code is based on publicly available information:
  * - Intel IXP4xx Developer's Manual and other e-papers
  * - Intel IXP400 Access Library Software (BSD license)