thermal: Update power allocator and devfreq cooling to SPDX licensing

Update the license to the SPDX licensing format.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200730165117.13998-1-lukasz.luba@arm.com

drivers/thermal/devfreq_cooling.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * devfreq_cooling: Thermal cooling device implementation for devices using
  *                  devfreq
  *
  * Copyright (C) 2014-2015 ARM Limited
  *
- * 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.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  * TODO:
  *    - If OPPs are added or removed after devfreq cooling has
  *      registered, the devfreq cooling won't react to it.

drivers/thermal/gov_power_allocator.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * A power allocator to manage temperature
  *
  * Copyright (C) 2014 ARM Ltd.
  *
- * 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.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
  */
 
 #define pr_fmt(fmt) "Power allocator: " fmt

include/linux/devfreq_cooling.h

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * devfreq_cooling: Thermal cooling device implementation for devices using
  *                  devfreq
  *
  * Copyright (C) 2014-2015 ARM Limited
  *
- * 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.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #ifndef __DEVFREQ_COOLING_H__