USB: serial: fix returnvar.cocci warnings

Remove unneeded variables when "0" can be returned.

Generated by: scripts/coccinelle/misc/returnvar.cocci
Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>

drivers/usb/serial/cyberjack.c

@@ -140,7 +140,6 @@ static int  cyberjack_open(struct tty_struct *tty,
 {
 	struct cyberjack_private *priv;
 	unsigned long flags;
-	int result = 0;
 
 	dev_dbg(&port->dev, "%s - usb_clear_halt\n", __func__);
 	usb_clear_halt(port->serial->dev, port->write_urb->pipe);
@@ -152,7 +151,7 @@ static int  cyberjack_open(struct tty_struct *tty,
 	priv->wrsent = 0;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	return result;
+	return 0;
 }
 
 static void cyberjack_close(struct usb_serial_port *port)

drivers/usb/serial/garmin_gps.c

@@ -860,7 +860,6 @@ static int process_resetdev_request(struct usb_serial_port *port)
 static int garmin_clear(struct garmin_data *garmin_data_p)
 {
 	unsigned long flags;
-	int status = 0;
 
 	/* flush all queued data */
 	pkt_clear(garmin_data_p);
@@ -870,7 +869,7 @@ static int garmin_clear(struct garmin_data *garmin_data_p)
 	garmin_data_p->outsize = 0;
 	spin_unlock_irqrestore(&garmin_data_p->lock, flags);
 
-	return status;
+	return 0;
 }