OPP: Handle all genpd cases together in _set_required_opps()

There is no real need of keeping separate code for single genpd case, it
can be made to work with a simple change.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: vireshk

drivers/opp/core.c

@@ -959,7 +959,8 @@ static int _set_required_opps(struct device *dev,
 			      struct dev_pm_opp *opp, bool up)
 {
 	struct opp_table **required_opp_tables = opp_table->required_opp_tables;
-	struct device **genpd_virt_devs = opp_table->genpd_virt_devs;
+	struct device **genpd_virt_devs =
+		opp_table->genpd_virt_devs ? opp_table->genpd_virt_devs : &dev;
 	int i, ret = 0;
 
 	if (!required_opp_tables)
@@ -979,12 +980,6 @@ static int _set_required_opps(struct device *dev,
 		return -ENOENT;
 	}
 
-	/* Single genpd case */
-	if (!genpd_virt_devs)
-		return _set_required_opp(dev, dev, opp, 0);
-
-	/* Multiple genpd case */
-
 	/*
 	 * Acquire genpd_virt_dev_lock to make sure we don't use a genpd_dev
 	 * after it is freed from another thread.