usb: gadget: pxa27x_udc: don't touch gadget.dev.driver

udc-core now handles that for us, which means
we can remove it from our driver.
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/pxa27x_udc.c

@@ -1809,7 +1809,6 @@ static int pxa27x_udc_start(struct usb_gadget *g,
 
 	/* first hook up the driver ... */
 	udc->driver = driver;
-	udc->gadget.dev.driver = &driver->driver;
 	dplus_pullup(udc, 1);
 
 	if (!IS_ERR_OR_NULL(udc->transceiver)) {
@@ -1827,7 +1826,6 @@ static int pxa27x_udc_start(struct usb_gadget *g,
 
 fail:
 	udc->driver = NULL;
-	udc->gadget.dev.driver = NULL;
 	return retval;
 }