iwm_fw_valid_rx_ant
if (iwm_fw_valid_rx_ant(sc) > 1)
if (iwm_fw_valid_rx_ant(sc) > 2)
cmd->rxchain_info = htole32(iwm_fw_valid_rx_ant(sc) <<
rx_ant = iwm_fw_valid_rx_ant(sc);
scan_config->rx_chains = htole32(iwm_fw_valid_rx_ant(sc));