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>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2ea245a..2d0e2e4 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/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;
 }