cpufreq: SPEAr: Fix sparse warning for cpufreq driver

This patch fixes following sparse warning:

drivers/cpufreq/spear-cpufreq.c:33:5: warning: symbol 'spear_cpufreq_verify' was
not declared. Should it be static?
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/spear-cpufreq.c

@@ -30,7 +30,7 @@ static struct {
 	u32 cnt;
 } spear_cpufreq;
 
-int spear_cpufreq_verify(struct cpufreq_policy *policy)
+static int spear_cpufreq_verify(struct cpufreq_policy *policy)
 {
 	return cpufreq_frequency_table_verify(policy, spear_cpufreq.freq_tbl);
 }