thermal: cpu_cooling: fix stub function

The function stub for cpufreq_cooling_get_level introduced
in 57df8106 "Thermal: exynos: fix cooling state translation"
is not syntactically correct C and needs to be fixed to avoid
this error:

In file included from drivers/thermal/db8500_thermal.c:20:0:
 include/linux/cpu_cooling.h: In function 'cpufreq_cooling_get_level':
include/linux/cpu_cooling.h:57:1:
 error: parameter name omitted  unsigned long cpufreq_cooling_get_level(unsigned int, unsigned int)  ^
 include/linux/cpu_cooling.h:57:1: error: parameter name omitted
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Amit Daniel kachhap <amit.daniel@samsung.com>
Cc: stable@vger.kernel.org
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>

include/linux/cpu_cooling.h

@@ -41,7 +41,7 @@ cpufreq_cooling_register(const struct cpumask *clip_cpus);
  */
 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
 
-unsigned long cpufreq_cooling_get_level(unsigned int, unsigned int);
+unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq);
 #else /* !CONFIG_CPU_THERMAL */
 static inline struct thermal_cooling_device *
 cpufreq_cooling_register(const struct cpumask *clip_cpus)
@@ -54,7 +54,7 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
 	return;
 }
 static inline
-unsigned long cpufreq_cooling_get_level(unsigned int, unsigned int)
+unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq)
 {
 	return THERMAL_CSTATE_INVALID;
 }