clocksource/drivers/digicolor: Convert to SPDX identifier

The license information clearly states GPL version 2 only. The extra text
which excludes warranties is an excerpt of the corresponding GPLv2 clause
11.

So the SPDX identifier covers it completely.

Signed-off-by: Thomas Gleixner <[e-mail]>
Cc: Daniel Lezcano <[e-mail]>
Cc: Baruch Siach <[e-mail]>
Cc: [e-mail]
Acked-by: Baruch Siach <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Daniel Lezcano <[e-mail]>

drivers/clocksource/timer-digicolor.c

···
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Conexant Digicolor timer driver
  *
···
  * Copyright (C) 2013 Maxime Ripard
  *
  * Maxime Ripard <[e-mail]>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 /*