drm/radeon: use drm_crtc_send_vblank_event()

Replace the legacy drm_send_vblank_event() with the new helper function.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460656118-16766-8-git-send-email-gustavo@padovan.org

drivers/gpu/drm/radeon/radeon_display.c

@@ -377,7 +377,7 @@ void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id)
 
 	/* wakeup userspace */
 	if (work->event)
-		drm_send_vblank_event(rdev->ddev, crtc_id, work->event);
+		drm_crtc_send_vblank_event(&radeon_crtc->base, work->event);
 
 	spin_unlock_irqrestore(&rdev->ddev->event_lock, flags);