V4L2_AV1_LOOP_FILTER_FLAG_DELTA_ENABLED
BIT_FLAG(ctrl_lf, V4L2_AV1_LOOP_FILTER_FLAG_DELTA_ENABLED);
if (loop_filter->flags & V4L2_AV1_LOOP_FILTER_FLAG_DELTA_ENABLED &&
{V4L2_AV1_LOOP_FILTER_FLAG_DELTA_ENABLED, "DELTA_ENABLED"},