opp: replace usage of found with dedicated list iterator variable

To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.

To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable instead of a
found boolean [1].

This removes the need to use a found variable and simply checking if
the variable was set, can determine if the break/goto was hit.

Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: Jakob-Koschel

drivers/opp/core.c

@@ -1486,26 +1486,25 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put);
  */
 void dev_pm_opp_remove(struct device *dev, unsigned long freq)
 {
-	struct dev_pm_opp *opp;
+	struct dev_pm_opp *opp = NULL, *iter;
 	struct opp_table *opp_table;
-	bool found = false;
 
 	opp_table = _find_opp_table(dev);
 	if (IS_ERR(opp_table))
 		return;
 
 	mutex_lock(&opp_table->lock);
 
-	list_for_each_entry(opp, &opp_table->opp_list, node) {
-		if (opp->rate == freq) {
-			found = true;
+	list_for_each_entry(iter, &opp_table->opp_list, node) {
+		if (iter->rate == freq) {
+			opp = iter;
 			break;
 		}
 	}
 
 	mutex_unlock(&opp_table->lock);
 
-	if (found) {
+	if (opp) {
 		dev_pm_opp_put(opp);
 
 		/* Drop the reference taken by dev_pm_opp_add() */