Symbol: IEEE80211_FVHT_MASK
sys/net80211/ieee80211_ioctl.c
1160
ireq->i_val = vap->iv_vht_flags & IEEE80211_FVHT_MASK;
sys/net80211/ieee80211_vht.c
865
if ((flags & IEEE80211_FVHT_MASK) == 0) {