BWN_DMA64_RXCTL
ctl = BWN_READ_4(mac, base + BWN_DMA64_RXCTL);
BWN_WRITE_4(mac, base + BWN_DMA64_RXCTL, ctl);
BWN_DMA_WRITE(dr, BWN_DMA64_RXCTL, value);
offset = (type == BHND_DMA_ADDR_64BIT) ? BWN_DMA64_RXCTL :