usb: serial: mxuport: Simplify return statement

Replace redundant variable use in return statement.
Signed-off-by: Saurabh Karajgaonkar <skarajga@visteon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/mxuport.c

@@ -1137,13 +1137,9 @@ static int mxuport_port_probe(struct usb_serial_port *port)
 		return err;
 
 	/* Set interface (RS-232) */
-	err = mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_INTERFACE,
+	return mxuport_send_ctrl_urb(serial, RQ_VENDOR_SET_INTERFACE,
 				     MX_INT_RS232,
 				     port->port_number);
-	if (err)
-		return err;
-
-	return 0;
 }
 
 static int mxuport_alloc_write_urb(struct usb_serial *serial,