drm/tilcdc: Increase time out for waiting frame done interrupt

Increase time out for waiting frame done interrupt. 50ms is long
enough for the usual display modes (50 Hz or higher refresh rate), but
it may be a bit tight for some unusual mode.
Signed-off-by: NJyri Sarha <jsarha@ti.com>

drivers/gpu/drm/tilcdc/tilcdc_crtc.c

@@ -127,7 +127,7 @@ static void stop(struct drm_crtc *crtc)
 	if (priv->rev == 2) {
 		int ret = wait_event_timeout(tilcdc_crtc->frame_done_wq,
 					     tilcdc_crtc->frame_done,
-					     msecs_to_jiffies(50));
+					     msecs_to_jiffies(500));
 		if (ret == 0)
 			dev_err(dev->dev, "%s: timeout waiting for framedone\n",
 				__func__);