drm/exynos: added device object to subdrv's remove callback as argument

when remove callback of exynos_drm_subdrv is called, it could need
device object for sub driver to control things specific to hw such as
runtime pm.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_vidi.c b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
index e364165..c95f7de 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_vidi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_vidi.c
@@ -453,7 +453,7 @@
 	return 0;
 }
 
-static void vidi_subdrv_remove(struct drm_device *drm_dev)
+static void vidi_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
 {
 	DRM_DEBUG_KMS("%s\n", __FILE__);