cpufreq: Fix sparse warning by making local function static

cpufreq_disabled() is a local function, so should be marked static.
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq.c

@@ -129,7 +129,7 @@ static int __init init_cpufreq_transition_notifier_list(void)
 pure_initcall(init_cpufreq_transition_notifier_list);
 
 static int off __read_mostly;
-int cpufreq_disabled(void)
+static int cpufreq_disabled(void)
 {
 	return off;
 }