Fix compilation warning introduced by:
commit 
0c7ff84f7f9d ("drm/sti: remove deprecated legacy vtg slave")
commit 
5e60f595d6ca ("drm/sti: use atomic_helper for commit")
Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
        return ret;
 }
 
-static void sti_drm_dbg_cleanup(struct drm_minor *minor)
-{
-       drm_debugfs_remove_files(sti_drm_dbg_list,
-                                ARRAY_SIZE(sti_drm_dbg_list), minor);
-
-       drm_debugfs_remove_files((struct drm_info_list *)&sti_drm_fps_fops,
-                                1, minor);
-}
-
 static int sti_atomic_check(struct drm_device *dev,
                            struct drm_atomic_state *state)
 {
 
 static int vtg_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
-       struct device_node *np;
        struct sti_vtg *vtg;
        struct resource *res;
        int ret;