vlan_default_pvid
if (vlan_default_pvid(br_vlan_group(br), pvid)) {
if (vlan_default_pvid(nbp_vlan_group(p), pvid) &&
if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
!vlan_default_pvid(vg, old_pvid)) ||