drm/tegra: Remove tegra_debugfs_cleanup()

drm_debugfs_cleanup() now removes all minor->debugfs_list entries
automatically, so the drm_driver.debugfs_cleanup callback is not
needed.

Cc: thierry.reding@gmail.com
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170126225621.12314-15-noralf@tronnes.org

drivers/gpu/drm/tegra/drm.c

@@ -894,12 +894,6 @@ static int tegra_debugfs_init(struct drm_minor *minor)
 					ARRAY_SIZE(tegra_debugfs_list),
 					minor->debugfs_root, minor);
 }
-
-static void tegra_debugfs_cleanup(struct drm_minor *minor)
-{
-	drm_debugfs_remove_files(tegra_debugfs_list,
-				 ARRAY_SIZE(tegra_debugfs_list), minor);
-}
 #endif
 
 static struct drm_driver tegra_drm_driver = {
@@ -917,7 +911,6 @@ static struct drm_driver tegra_drm_driver = {
 
 #if defined(CONFIG_DEBUG_FS)
 	.debugfs_init = tegra_debugfs_init,
-	.debugfs_cleanup = tegra_debugfs_cleanup,
 #endif
 
 	.gem_free_object_unlocked = tegra_bo_free_object,