iavf_add_mac_filter
error = iavf_add_mac_filter(sc, (u8*)LLADDR(sdl), IAVF_FILTER_MC);
int iavf_add_mac_filter(struct iavf_sc *sc, u8 *macaddr, u16 flags);
error = iavf_add_mac_filter(sc, hw->mac.addr, 0);