AR_TPC_ACK
ahp->ah_macTPC = SM(MAX_RATE_POWER, AR_TPC_ACK)
ahp->ah_macTPC &= AR_TPC_ACK;
ahp->ah_macTPC |= MS(setting, AR_TPC_ACK);
*result = MS(ahp->ah_macTPC, AR_TPC_ACK);
ackTpcPow = MS(ahp->ah_macTPC, AR_TPC_ACK);
powerVal = SM(ackTpcPow, AR_TPC_ACK) |
powerVal = SM(ackTpcPow, AR_TPC_ACK) |