usb: mtu3: remove wakelock

Prefer to use /sys/power/wake_lock instead.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1623139069-8173-8-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/mtu3/mtu3_dr.c

@@ -174,11 +174,8 @@ static void ssusb_set_mailbox(struct otg_switch_mtk *otg_sx,
 		break;
 	case MTU3_VBUS_OFF:
 		mtu3_stop(mtu);
-		pm_relax(ssusb->dev);
 		break;
 	case MTU3_VBUS_VALID:
-		/* avoid suspend when works as device */
-		pm_stay_awake(ssusb->dev);
 		mtu3_start(mtu);
 		break;
 	default: