ath_regd_get_band_ctl
ctl_mode = ath_regd_get_band_ctl(regulatory, channel->band);
u32 ctl = ath_regd_get_band_ctl(reg, chan->chan->band);
ctl_grp = ath_regd_get_band_ctl(&ar->common.regulatory,
EXPORT_SYMBOL(ath_regd_get_band_ctl);
u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,