staging: serqt_usb2: remove retval initialisation in qt_tiocmget and qt_tiocmset

in qt_tiocmset,

the retval gets assigned if we have a valid serial pointer in the critical section
(between mutex_lock and _unlock) of the code, no need to initialise this variable.

the same retval assignment follows in the qt_tiocmget function also, so remove the
initialisation here too.
Signed-off-by: Devendra Naga <develkernel412222@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/serqt_usb2/serqt_usb2.c

@@ -1412,7 +1412,7 @@ static int qt_tiocmget(struct tty_struct *tty)
 	struct usb_serial_port *port = tty->driver_data;
 	struct usb_serial *serial = get_usb_serial(port, __func__);
 	struct quatech_port *qt_port = qt_get_port_private(port);
-	int retval = -ENODEV;
+	int retval;
 
 	if (!serial)
 		return -ENODEV;
@@ -1430,7 +1430,7 @@ static int qt_tiocmset(struct tty_struct *tty,
 	struct usb_serial_port *port = tty->driver_data;
 	struct usb_serial *serial = get_usb_serial(port, __func__);
 	struct quatech_port *qt_port = qt_get_port_private(port);
-	int retval = -ENODEV;
+	int retval;
 
 	if (!serial)
 		return -ENODEV;