usb: gadget: udc: renesas_usb3: make usb_ep_ops const

Make the structure const as it is only stored in the ops field of a
usb_ep structure, which is of type const.
Done using Coccinelle.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/gadget/udc/renesas_usb3.c

@@ -2187,7 +2187,7 @@ static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
 	}
 }
 
-static struct usb_ep_ops renesas_usb3_ep_ops = {
+static const struct usb_ep_ops renesas_usb3_ep_ops = {
 	.enable		= renesas_usb3_ep_enable,
 	.disable	= renesas_usb3_ep_disable,