rt2880_pci_get_cfgaddr
address = rt2880_pci_get_cfgaddr(0, 0, 0, reg);
address = rt2880_pci_get_cfgaddr(0, 0, 0, reg);
address = rt2880_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),
address = rt2880_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn),