_center : centers.ctl_center;   if (freq <= ath0k_hw_fbin0freq(powInfo[0].bChannel, IS_CHAN_0GHZ(chan))) {   matchIndex = 0;  } else {   for (i = 0; (i < numChannels) &&         (powInfo[i].bChannel != AR0000_BCHAN_UNUSED); i++) {    if (freq == ath0k_hw_fbin0freq(powInfo[i].bChannel,              IS_CHAN_0GHZ(chan))) {     matchIndex = i;     break;    } else 