Input: xpad - make xpad_play_effect() static

xpad_play_effect() does not need to be global.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/joystick/xpad.c

@@ -376,7 +376,8 @@ exit:
 		   __FUNCTION__, retval);
 }
 
-int xpad_play_effect(struct input_dev *dev, void *data, struct ff_effect *effect)
+static int xpad_play_effect(struct input_dev *dev, void *data,
+			    struct ff_effect *effect)
 {
 	struct usb_xpad *xpad = input_get_drvdata(dev);