Input: fsl-imx25-tcq - switch to SPDX identifier

Adopt the SPDX license identifier headers to ease license compliance
management.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/fsl-imx25-tcq.c

-/*
- * Copyright (C) 2014-2015 Pengutronix, Markus Pargmann <mpa@pengutronix.de>
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
- * Based on driver from 2011:
- *   Juergen Beisert, Pengutronix <kernel@pengutronix.de>
- *
- * This is the driver for the imx25 TCQ (Touchscreen Conversion Queue)
- * connected to the imx25 ADC.
- */
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2014-2015 Pengutronix, Markus Pargmann <mpa@pengutronix.de>
+// Based on driver from 2011:
+//   Juergen Beisert, Pengutronix <kernel@pengutronix.de>
+//
+// This is the driver for the imx25 TCQ (Touchscreen Conversion Queue)
+// connected to the imx25 ADC.
 
 #include <linux/clk.h>
 #include <linux/device.h>