extcon: Deduplicate code in extcon_set_state_sync()

Finding the cable index and checking for changed status is also done
in extcon_set_state(). So calling extcon_set_state_sync() will do these
checks twice. Remove them and use these checks from extcon_set_state().

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

drivers/extcon/extcon.c

@@ -576,19 +576,7 @@ EXPORT_SYMBOL_GPL(extcon_set_state);
  */
 int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state)
 {
-	int ret, index;
-	unsigned long flags;
-
-	index = find_cable_index_by_id(edev, id);
-	if (index < 0)
-		return index;
-
-	/* Check whether the external connector's state is changed. */
-	spin_lock_irqsave(&edev->lock, flags);
-	ret = is_extcon_changed(edev, index, state);
-	spin_unlock_irqrestore(&edev->lock, flags);
-	if (!ret)
-		return 0;
+	int ret;
 
 	ret = extcon_set_state(edev, id, state);
 	if (ret < 0)