Input: adi - remove an unnecessary check

The input_free_device() function tests whether its argument is NULL and
then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/joystick/adi.c

@@ -535,7 +535,6 @@ static int adi_connect(struct gameport *gameport, struct gameport_driver *drv)
 		}
 	}
  fail2:	for (i = 0; i < 2; i++)
-		if (port->adi[i].dev)
 		input_free_device(port->adi[i].dev);
 	gameport_close(gameport);
  fail1:	gameport_set_drvdata(gameport, NULL);