addchan
addchan(c, hc->freq, flags | IEEE80211_CHAN_HT40U,
addchan(c, extc->ic_freq, flags | IEEE80211_CHAN_HT40D,
addchan(c, hc->freq, flags, hc->ieee, hc->maxTxPow);
static void addchan(struct mwl_channel *, int, int, int, int);