fw_crc16
fc->topology_map->crc = fw_crc16(
fc->speed_map->crc = fw_crc16(
u_int16_t fw_crc16 (u_int32_t *, u_int32_t);
sc->fc.config_rom[0] |= fw_crc16(&sc->fc.config_rom[1], 5*4);