usb: gadget: mv_udc: disable ISR when stopped

When device is stopped, there is no need to handle ISR.
Especially when otg switch to HOST mode.

Signed-off-by: Neil Zhang <zhangwm@marvell.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/mv_udc.h b/drivers/usb/gadget/mv_udc.h
index b2c36ee..3d84044 100644
--- a/drivers/usb/gadget/mv_udc.h
+++ b/drivers/usb/gadget/mv_udc.h
@@ -211,7 +211,8 @@
 				softconnected:1,
 				force_fs:1,
 				clock_gating:1,
-				active:1;
+				active:1,
+				stopped:1;      /* stop bit is setted */
 
 	struct work_struct	vbus_work;
 	struct workqueue_struct *qwork;