cpufreq: exynos: Check old & new frequency early

If old & new freq have the same frequency, no need to call
cpufreq notifier & regulator function.
Signed-off-by: NJonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

drivers/cpufreq/exynos-cpufreq.c

@@ -87,6 +87,9 @@ static int exynos_target(struct cpufreq_policy *policy,
 	freqs.new = freq_table[index].frequency;
 	freqs.cpu = policy->cpu;
 
+	if (freqs.new == freqs.old)
+		goto out;
+
 	/*
 	 * ARM clock source will be changed APLL to MPLL temporary
 	 * To support this level, need to control regulator for
@@ -113,7 +116,7 @@ static int exynos_target(struct cpufreq_policy *policy,
 	if (safe_arm_volt)
 		regulator_set_voltage(arm_regulator, safe_arm_volt,
 				      safe_arm_volt);
-	if (freqs.new != freqs.old)
+
 	exynos_info->set_freq(old_index, index);
 
 	for_each_cpu(freqs.cpu, policy->cpus)