- Eliminate the stack allocation of a struct pci_dev, and make
  pci_scan_slot() take a bus and a devfn argument.
- Add "dev->multifunction" to indicate whether this is a multifunction
  device.
- Run header fixups before inserting the new pci device into any
  device lists or announcing it to the drivers.
- Convert some more stuff to use the list_for_each* macro(s).