thermal: uniphier: Convert to SPDX identifier

This converts license boilerplate to SPDX identifier, and removes
unnecessary lines.
Signed-off-by: NKunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NEduardo Valentin <edubezval@gmail.com>

drivers/thermal/uniphier_thermal.c

+// SPDX-License-Identifier: GPL-2.0
 /**
  * uniphier_thermal.c - Socionext UniPhier thermal driver
- *
  * Copyright 2014      Panasonic Corporation
  * Copyright 2016-2017 Socionext Inc.
- * All rights reserved.
- *
  * Author:
  *	Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2  of
- * the License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/bitops.h>