PCIR_SUBCLASS
dinfo->cfg.subclass = pci_read_config(dev, PCIR_SUBCLASS, 1);
cfg->subclass = REG(PCIR_SUBCLASS, 1);
PCIR_SUBCLASS, 1);
class = pci_cfgregread(bus, slot, func, PCIR_SUBCLASS, 2);
pci_cfgregread(0, 11, 0, PCIR_SUBCLASS, 1) != PCIS_BRIDGE_PCI ||
pci_cfgregread(0, 1, 0, PCIR_SUBCLASS, 1) != PCIS_BRIDGE_PCI ||