ac97_attach
void ac97_attach(ac97_dev **dev, codec_reg_read reg_read,
ac97_attach(&card->config.ac97, (codec_reg_read)auich_codec_read,
ac97_attach(&card->config.ac97, (codec_reg_read)auvia_codec_read,
ac97_attach(&controller->ac97, (codec_reg_read)geode_codec_read,
ac97_attach(&fAC97Dev, _ReadAC97, _WriteAC97, this,