RTW_SR_TXPOWER1
idx = RTW_SR_TXPOWER1 +
KASSERT2(idx >= RTW_SR_TXPOWER1 && idx <= RTW_SR_TXPOWER14,
idx - RTW_SR_TXPOWER1 + 1));
u_int idx = RTW_SR_TXPOWER1 + ieee80211_chan2ieee(ic, chan) - 1;
KASSERT2(idx >= RTW_SR_TXPOWER1 && idx <= RTW_SR_TXPOWER14,
idx - RTW_SR_TXPOWER1 + 1));