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

Replace the legacy drm_vblank_{get,put}() with the new helper functions.

Signed-off-by: Gustavo Padovan <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/qxl/qxl_display.c

···
 {
 	struct drm_device *dev = crtc->dev;
 	struct qxl_device *qdev = dev->dev_private;
-	struct qxl_crtc *qcrtc = to_qxl_crtc(crtc);
 	struct qxl_framebuffer *qfb_src = to_qxl_framebuffer(fb);
 	struct qxl_framebuffer *qfb_old = to_qxl_framebuffer(crtc->primary->fb);
 	struct qxl_bo *bo_old = gem_to_qxl_bo(qfb_old->obj);
···
 	qxl_draw_dirty_fb(qdev, qfb_src, bo, 0, 0,
 			  &norect, one_clip_rect, inc);
 
-	drm_vblank_get(dev, qcrtc->index);
+	drm_crtc_vblank_get(crtc);
 
 	if (event) {
 		spin_lock_irqsave(&dev->event_lock, flags);
 		drm_crtc_send_vblank_event(crtc, event);
 		spin_unlock_irqrestore(&dev->event_lock, flags);
 	}
-	drm_vblank_put(dev, qcrtc->index);
+	drm_crtc_vblank_put(crtc);
 
 	ret = qxl_bo_reserve(bo, false);
 	if (!ret) {