opp: Fix adding OPP entries in a wrong order if rate is unavailable

Fix adding OPP entries in a wrong (opposite) order if OPP rate is
unavailable. The OPP comparison was erroneously skipped, thus OPPs
were left unsorted.
Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

drivers/opp/core.c

@@ -1527,13 +1527,11 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
 	mutex_lock(&opp_table->lock);
 	head = &opp_table->opp_list;
 
-	if (likely(!rate_not_available)) {
 	ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
 	if (ret) {
 		mutex_unlock(&opp_table->lock);
 		return ret;
 	}
-	}
 
 	list_add(&new_opp->node, head);
 	mutex_unlock(&opp_table->lock);