BWN_INTR_BEACON
if (mac->mac_reason_intr & BWN_INTR_BEACON)
mac->mac_intr_mask &= ~BWN_INTR_BEACON;
BWN_WRITE_4(mac, BWN_INTR_REASON, BWN_INTR_BEACON);
mac->mac_intr_mask |= BWN_INTR_BEACON;