treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 315

Based on 1 normalized pattern(s):

  license gplv2 as published by the fsf

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: Armijn Hemel <armijn@tjaldur.nl>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000434.797597276@linutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/input/touchscreen/ar1021_i2c.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Microchip AR1020 and AR1021 driver for I2C
  *
  * Author: Christian Gmeiner <christian.gmeiner@gmail.com>
- *
- * License: GPLv2 as published by the FSF.
  */
 
 #include <linux/bitops.h>

drivers/input/touchscreen/tsc40.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * TSC-40 serial touchscreen driver. It should be compatible with
  * TSC-10 and 25.
  *
  * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
- * License: GPLv2 as published by the FSF.
  */
 
 #include <linux/kernel.h>