Revert "cpufreq: schedutil: Reduce frequencies slower"

Revert commit 39b64aa1 (cpufreq: schedutil: Reduce frequencies
slower) that introduced unintentional changes in behavior leading
to adverse effects on some systems.
Reported-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

kernel/sched/cpufreq_schedutil.c

@@ -101,9 +101,6 @@ static void sugov_update_commit(struct sugov_policy *sg_policy, u64 time,
 	if (sg_policy->next_freq == next_freq)
 		return;
 
-	if (sg_policy->next_freq > next_freq)
-		next_freq = (sg_policy->next_freq + next_freq) >> 1;
-
 	sg_policy->next_freq = next_freq;
 	sg_policy->last_freq_update_time = time;