PCIR_BRIDGECTL_2
pci_write_config(dev, PCIR_BRIDGECTL_2,
PCIR_BRIDGECTL_2, 2);
cfg->bridge.br_control = REG(PCIR_BRIDGECTL_2, 2);
bctl = read_config(fd, &p->pc_sel, PCIR_BRIDGECTL_2, 2);