drm/debugfs: Remove the drm_driver.debugfs_cleanup callback

Remove the .debugfs_cleanup() callback now that all the users are gone.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170307204924.1002-3-noralf@tronnes.org

drivers/gpu/drm/drm_debugfs.c

@@ -242,14 +242,9 @@ static void drm_debugfs_remove_all_files(struct drm_minor *minor)
  */
 int drm_debugfs_cleanup(struct drm_minor *minor)
 {
-	struct drm_device *dev = minor->dev;
-
 	if (!minor->debugfs_root)
 		return 0;
 
-	if (dev->driver->debugfs_cleanup)
-		dev->driver->debugfs_cleanup(minor);
-
 	drm_debugfs_remove_all_files(minor);
 
 	debugfs_remove_recursive(minor->debugfs_root);

include/drm/drm_drv.h

@@ -302,7 +302,6 @@ struct drm_driver {
 	void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
 
 	int (*debugfs_init)(struct drm_minor *minor);
-	void (*debugfs_cleanup)(struct drm_minor *minor);
 
 	/**
 	 * @gem_free_object: deconstructor for drm_gem_objects