usb: gadget: mv_udc: add otg relative code

Add otg relative code, make it possible to switch between host and
device.

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 daa75c1..b2c36ee 100644
--- a/drivers/usb/gadget/mv_udc.h
+++ b/drivers/usb/gadget/mv_udc.h
@@ -216,6 +216,8 @@
 	struct work_struct	vbus_work;
 	struct workqueue_struct *qwork;
 
+	struct otg_transceiver	*transceiver;
+
 	struct mv_usb_platform_data     *pdata;
 
 	/* some SOC has mutiple clock sources for USB*/