Input: walkera0701 - set up input device's parent

This will place the joystick's input device into propoer place in sysfs
hierarchy as long as th port has device assigned to it (i.e. it is not
legacy port).

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/joystick/walkera0701.c

@@ -241,6 +241,7 @@ static int walkera0701_connect(struct walkera_dev *w, int parport)
 	w->input_dev->id.vendor = 0x0001;
 	w->input_dev->id.product = 0x0001;
 	w->input_dev->id.version = 0x0100;
+	w->input_dev->dev.parent = w->parport->dev;
 	w->input_dev->open = walkera0701_open;
 	w->input_dev->close = walkera0701_close;