usb: gadget: fsl_udc_core: use udc-core's reset notifier

Replace usb_gadget_driver's disconnect with udc-core's reset notifier at
bus reset handler.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc/fsl_udc_core.c

@@ -1771,7 +1771,7 @@ static void bus_resume(struct fsl_udc *udc)
 }
 
 /* Clear up all ep queues */
-static int reset_queues(struct fsl_udc *udc)
+static int reset_queues(struct fsl_udc *udc, bool bus_reset)
 {
 	u8 pipe;
 
@@ -1780,7 +1780,10 @@ static int reset_queues(struct fsl_udc *udc)
 
 	/* report disconnect; the driver is already quiesced */
 	spin_unlock(&udc->lock);
-	udc->driver->disconnect(&udc->gadget);
+	if (bus_reset)
+		usb_gadget_udc_reset(&udc->gadget, udc->driver);
+	else
+		udc->driver->disconnect(&udc->gadget);
 	spin_lock(&udc->lock);
 
 	return 0;
@@ -1834,7 +1837,7 @@ static void reset_irq(struct fsl_udc *udc)
 		udc->bus_reset = 1;
 		/* Reset all the queues, include XD, dTD, EP queue
 		 * head and TR Queue */
-		reset_queues(udc);
+		reset_queues(udc, true);
 		udc->usb_state = USB_STATE_DEFAULT;
 	} else {
 		VDBG("Controller reset");
@@ -1843,7 +1846,7 @@ static void reset_irq(struct fsl_udc *udc)
 		dr_controller_setup(udc);
 
 		/* Reset all internal used Queues */
-		reset_queues(udc);
+		reset_queues(udc, false);
 
 		ep0_setup(udc);