cpufreq: powernv: make local function static

powernv_cpufreq_get() is only referenced in this file.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org> on V2.
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/powernv-cpufreq.c

@@ -235,7 +235,7 @@ static void powernv_read_cpu_freq(void *arg)
  * firmware for CPU 'cpu'. This value is reported through the sysfs
  * file cpuinfo_cur_freq.
  */
-unsigned int powernv_cpufreq_get(unsigned int cpu)
+static unsigned int powernv_cpufreq_get(unsigned int cpu)
 {
 	struct powernv_smp_call_data freq_data;