opp: Don't return opp_dev from _find_opp_dev()

/* Flag indicating that opp_tables list is being updated at the moment */

static bool opp_tables_busy;

static struct opp_device *_find_opp_dev(const struct device *dev,

					struct opp_table *opp_table)

static bool _find_opp_dev(const struct device *dev, struct opp_table *opp_table)

{

	struct opp_device *opp_dev;

	bool found = false;

	mutex_lock(&opp_table->lock);

	list_for_each_entry(opp_dev, &opp_table->dev_list, node)

		if (opp_dev->dev == dev)

			return opp_dev;

		if (opp_dev->dev == dev) {

			found = true;

			break;

		}

	return NULL;

	mutex_unlock(&opp_table->lock);

	return found;

}

static struct opp_table *_find_opp_table_unlocked(struct device *dev)

{

	struct opp_table *opp_table;

	bool found;

	list_for_each_entry(opp_table, &opp_tables, node) {

		mutex_lock(&opp_table->lock);

		found = !!_find_opp_dev(dev, opp_table);

		mutex_unlock(&opp_table->lock);

		if (found) {

		if (_find_opp_dev(dev, opp_table)) {

			_get_opp_table_kref(opp_table);

			return opp_table;

		}

	}