AR5K_TUNE_DMA_BEACON_RESP
timer1 = (next_beacon - AR5K_TUNE_DMA_BEACON_RESP) << 3;
(AR5K_TUNE_SW_BEACON_RESP - AR5K_TUNE_DMA_BEACON_RESP) -
timer1 = (next_beacon - AR5K_TUNE_DMA_BEACON_RESP) <<
(AR5K_TUNE_SW_BEACON_RESP - AR5K_TUNE_DMA_BEACON_RESP) -
timer1 = (next_beacon - AR5K_TUNE_DMA_BEACON_RESP) <<