usb: chipidea: udc: remove redundant assignment to variable retval

The variable retval is being initialized with a value that is never
read and it is being updated later with a new value. The
initialization is redundant and can be removed.  Also remove a blank
line.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190704150341.759-1-colin.king@canonical.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/udc.c

@@ -1746,12 +1746,11 @@ static int ci_udc_start(struct usb_gadget *gadget,
 			 struct usb_gadget_driver *driver)
 {
 	struct ci_hdrc *ci = container_of(gadget, struct ci_hdrc, gadget);
-	int retval = -ENOMEM;
+	int retval;
 
 	if (driver->disconnect == NULL)
 		return -EINVAL;
 
-
 	ci->ep0out->ep.desc = &ctrl_endpt_out_desc;
 	retval = usb_ep_enable(&ci->ep0out->ep);
 	if (retval)