cpufreq: Use cpufreq_for_each_* macros for frequency table iteration

The cpufreq core now supports the cpufreq_for_each_entry and
cpufreq_for_each_valid_entry macros helpers for iteration over the
cpufreq_frequency_table, so use them.

It should have no functional changes.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index f99cfe2..9c13255 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -29,17 +29,16 @@
 static int exynos_cpufreq_get_index(unsigned int freq)
 {
 	struct cpufreq_frequency_table *freq_table = exynos_info->freq_table;
-	int index;
+	struct cpufreq_frequency_table *pos;
 
-	for (index = 0;
-		freq_table[index].frequency != CPUFREQ_TABLE_END; index++)
-		if (freq_table[index].frequency == freq)
+	cpufreq_for_each_entry(pos, freq_table)
+		if (pos->frequency == freq)
 			break;
 
-	if (freq_table[index].frequency == CPUFREQ_TABLE_END)
+	if (pos->frequency == CPUFREQ_TABLE_END)
 		return -EINVAL;
 
-	return index;
+	return pos - freq_table;
 }
 
 static int exynos_cpufreq_scale(unsigned int target_freq)