driver/misc/fsa9480.c fix potential null-pointer dereference

Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Cc: Donggeun Kim <dg77.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/fsa9480.c

@@ -400,6 +400,7 @@ static int fsa9480_irq_init(struct fsa9480_usbsw *usbsw)
 			return ret;
 		}
 
+		if (pdata)
 			device_init_wakeup(&client->dev, pdata->wakeup);
 	}