treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 254

Based on 1 normalized pattern(s):

  this file is released under the gnu gpl v2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141332.816211035@linutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/uwb/umc-bus.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Bus for UWB Multi-interface Controller capabilities.
  *
  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- *
- * This file is released under the GNU GPL v2.
  */
 #include <linux/kernel.h>
 #include <linux/sysfs.h>

drivers/uwb/umc-dev.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * UWB Multi-interface Controller device management.
  *
  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- *
- * This file is released under the GNU GPL v2.
  */
 #include <linux/kernel.h>
 #include <linux/export.h>

drivers/uwb/umc-drv.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * UWB Multi-interface Controller driver management.
  *
  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- *
- * This file is released under the GNU GPL v2.
  */
 #include <linux/kernel.h>
 #include <linux/export.h>

drivers/uwb/whci.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * WHCI UWB Multi-interface Controller enumerator.
  *
  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
- *
- * This file is released under the GNU GPL v2.
  */
 #include <linux/delay.h>
 #include <linux/kernel.h>