thermal: cpu cooling: use const parameter while registering

There are predefined cpu_masks that are const data structures.
This patch changes the cpu cooling register function so that
those const cpu_masks can be used, without compilation warnings.

include/linux/cpumask.h

 * The following particular system cpumasks and operations manage
 * possible, present, active and online cpus.
 *
 *     cpu_possible_mask- has bit 'cpu' set iff cpu is populatable
 *     cpu_present_mask - has bit 'cpu' set iff cpu is populated
 *     cpu_online_mask  - has bit 'cpu' set iff cpu available to scheduler
 *     cpu_active_mask  - has bit 'cpu' set iff cpu available to migration
 *
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

drivers/thermal/cpu_cooling.c

@@ -313,7 +313,7 @@ static struct notifier_block thermal_cpufreq_notifier_block = {
  * @clip_cpus: cpumask of cpus where the frequency constraints will happen.
  */
 struct thermal_cooling_device *cpufreq_cooling_register(
-	struct cpumask *clip_cpus)
+	const struct cpumask *clip_cpus)
 {
 	struct thermal_cooling_device *cool_dev;
 	struct cpufreq_cooling_device *cpufreq_dev = NULL;

include/linux/cpu_cooling.h

@@ -35,7 +35,7 @@
  * @clip_cpus: cpumask of cpus where the frequency constraints will happen
  */
 struct thermal_cooling_device *cpufreq_cooling_register(
-		struct cpumask *clip_cpus);
+		const struct cpumask *clip_cpus);
 
 /**
  * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
@@ -44,7 +44,7 @@ struct thermal_cooling_device *cpufreq_cooling_register(
 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
 #else /* !CONFIG_CPU_THERMAL */
 static inline struct thermal_cooling_device *cpufreq_cooling_register(
-	struct cpumask *clip_cpus)
+	const struct cpumask *clip_cpus)
 {
 	return NULL;
 }