drm/atmel: use drm_crtc_vblank_{get,put}()

Replace the legacy drm_vblank_{get,put}() with the new helper functions.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465224105-21485-10-git-send-email-gustavo@padovan.org

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c

@@ -375,7 +375,7 @@ static void atmel_hlcdc_crtc_finish_page_flip(struct atmel_hlcdc_crtc *crtc)
 	spin_lock_irqsave(&dev->event_lock, flags);
 	if (crtc->event) {
 		drm_crtc_send_vblank_event(&crtc->base, crtc->event);
-		drm_vblank_put(dev, crtc->id);
+		drm_crtc_vblank_put(&crtc->base);
 		crtc->event = NULL;
 	}
 	spin_unlock_irqrestore(&dev->event_lock, flags);