USB: serial: remove debug parameter from usb_serial_debug_data()

We should use dev_dbg() for usb_serial_debug_data() like all of the rest
of the usb-serial drivers use, so remove the debug parameter as it's not
needed.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/serial/navman.c b/drivers/usb/serial/navman.c
index d95452c..e0b4d4f 100644
--- a/drivers/usb/serial/navman.c
+++ b/drivers/usb/serial/navman.c
@@ -55,8 +55,7 @@
 		goto exit;
 	}
 
-	usb_serial_debug_data(debug, &port->dev, __func__,
-			      urb->actual_length, data);
+	usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
 
 	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {