cpufreq: stats: Enable stats for fast-switch as well

Now that all the blockers are gone for enabling stats in fast-switching
case, enable it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq.c

@@ -2072,8 +2072,12 @@ unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
 	target_freq = clamp_val(target_freq, policy->min, policy->max);
 	freq = cpufreq_driver->fast_switch(policy, target_freq);
 
+	if (!freq)
+		return 0;
+
 	arch_set_freq_scale(policy->related_cpus, freq,
 			    policy->cpuinfo.max_freq);
+	cpufreq_stats_record_transition(policy, freq);
 
 	return freq;
 }

drivers/cpufreq/cpufreq_stats.c

@@ -69,9 +69,6 @@ static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
 	ssize_t len = 0;
 	int i;
 
-	if (policy->fast_switch_enabled)
-		return 0;
-
 	for (i = 0; i < stats->state_num; i++) {
 		if (pending) {
 			if (i == stats->last_index)
@@ -115,9 +112,6 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
 	ssize_t len = 0;
 	int i, j, count;
 
-	if (policy->fast_switch_enabled)
-		return 0;
-
 	len += scnprintf(buf + len, PAGE_SIZE - len, "   From  :    To\n");
 	len += scnprintf(buf + len, PAGE_SIZE - len, "         : ");
 	for (i = 0; i < stats->state_num; i++) {