NPC_VLAN_ETYPE_STAG
[NPC_VLAN_ETYPE_STAG] = "vlan ether type stag",
BIT_ULL(NPC_VLAN_ETYPE_STAG);
bool stag = !!(features & BIT_ULL(NPC_VLAN_ETYPE_STAG));
req->features |= BIT_ULL(NPC_VLAN_ETYPE_STAG);