Z_ARRAY_MODE
ib[idx] &= ~Z_ARRAY_MODE(0xf);
track->db_z_info &= ~Z_ARRAY_MODE(0xf);
ib[idx] |= Z_ARRAY_MODE(evergreen_cs_get_aray_mode(reloc->tiling_flags));
track->db_z_info |= Z_ARRAY_MODE(evergreen_cs_get_aray_mode(reloc->tiling_flags));