drm/exynos: clear node object type at gem unmap

This patch clears node object type in G2D unmap cmdlist.
The obj_type of cmdlist node has to be cleared in
g2d_unmap_cmdlist_gem() so that the node can be reused
in g2d_map_cmdlist_gem().

Signed-off-by: YoungJun Cho <yj44.cho@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_g2d.c

@@ -576,6 +576,7 @@ static void g2d_unmap_cmdlist_gem(struct g2d_data *g2d,
 							false);
 
 		node->handles[i] = 0;
+		node->obj_type[i] = 0;
 	}
 
 	node->map_nr = 0;