drm/exynos: Drop drm_vblank_cleanup

Only in the load failure path, where the hardware is quiet anyway.

Cc: Inki Dae <[e-mail]>
Cc: Joonyoung Shim <[e-mail]>
Cc: Seung-Woo Kim <[e-mail]>
Cc: Kyungmin Park <[e-mail]>
Reviewed-by: Inki Dae <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>
Link: http://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/exynos/exynos_drm_drv.c

···
 	/* Probe non kms sub drivers and virtual display driver. */
 	ret = exynos_drm_device_subdrv_probe(drm);
 	if (ret)
-		goto err_cleanup_vblank;
+		goto err_unbind_all;
 
 	drm_mode_config_reset(drm);
 
···
 	exynos_drm_fbdev_fini(drm);
 	drm_kms_helper_poll_fini(drm);
 	exynos_drm_device_subdrv_remove(drm);
-err_cleanup_vblank:
-	drm_vblank_cleanup(drm);
 err_unbind_all:
 	component_unbind_all(drm->dev, drm);
 err_mode_config_cleanup: