When the exynos_drm_subdrv_open() returns error, the file_priv
should be released and file->driver_priv set to NULL.
Signed-off-by: NYoungJun Cho <yj44.cho@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>