PCIR_VPD_DATA
*data = (REG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, 4));
WREG(cfg->vpd.vpd_reg + PCIR_VPD_DATA, data, 4);
*word = pci_read_config(sc->age_dev, vpdc + PCIR_VPD_DATA, 4);