drm/ttm: drop ttm_buffer_object->resv

All users moved to ttm_buffer_object->base.resv

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190805140119.7337-18-kraxel@redhat.com

drivers/gpu/drm/ttm/ttm_bo.c

@@ -1332,11 +1332,9 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
 	bo->acc_size = acc_size;
 	bo->sg = sg;
 	if (resv) {
-		bo->resv = resv;
 		bo->base.resv = resv;
 		reservation_object_assert_held(bo->base.resv);
 	} else {
-		bo->resv = &bo->base._resv;
 		bo->base.resv = &bo->base._resv;
 	}
 	if (!ttm_bo_uses_embedded_gem_object(bo)) {