usb: dwc3: gadget: pre-issue Start Transfer for Interrupt EPs too

Interrupt endpoints behave much like Bulk endpoints with the exception
that they are periodic. We can pre-issue Start Transfer exactly as we
do for Bulk endpoints.

While at that, remove one trailing blank line which is unnecessary.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc3/gadget.c

@@ -671,7 +671,8 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
 	 * Issue StartTransfer here with no-op TRB so we can always rely on No
 	 * Response Update Transfer command.
 	 */
-	if (usb_endpoint_xfer_bulk(desc)) {
+	if (usb_endpoint_xfer_bulk(desc) ||
+			usb_endpoint_xfer_int(desc)) {
 		struct dwc3_gadget_ep_cmd_params params;
 		struct dwc3_trb	*trb;
 		dma_addr_t trb_dma;
@@ -696,7 +697,6 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
 		WARN_ON_ONCE(!dep->resource_index);
 	}
 
-
 out:
 	trace_dwc3_gadget_ep_enable(dep);