cpufreq: powernow-k8: call CPUFREQ_POSTCHANGE notfier in error cases

PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e.
either both should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we
must call POSTCHANGE notifier with freqs.new = freqs.old to guarantee
that sequence of calling notifiers is complete.

This patch fixes it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/powernow-k8.c

@@ -967,8 +967,8 @@ static int transition_frequency_fidvid(struct powernow_k8_data *data,
 
 	res = transition_fid_vid(data, fid, vid);
 	if (res)
-		return res;
-
+		freqs.new = freqs.old;
+	else
 		freqs.new = find_khz_freq_from_fid(data->currfid);
 
 	cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);