NFP_NET_VF_CFG_VLAN_PROT
vlan_tag |= FIELD_PREP(NFP_NET_VF_CFG_VLAN_PROT, ntohs(vlan_proto));
ivi->vlan_proto = htons(FIELD_GET(NFP_NET_VF_CFG_VLAN_PROT, vlan_tag));