treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 498

Based on 1 normalized pattern(s):

  gplv2 only

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: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Armijn Hemel <armijn@tjaldur.nl>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.666840552@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/dt-bindings/dma/at91.h

@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * This header provides macros for at91 dma bindings.
  *
  * Copyright (C) 2013 Ludovic Desroches <ludovic.desroches@atmel.com>
- *
- * GPLv2 only
  */
 
 #ifndef __DT_BINDINGS_AT91_DMA_H__