Merge branch 'pci/enumeration'

- Use PCI_HEADER_TYPE_* defines, not hard-coded values (Ilpo Järvinen)

- Clean up early_dump_pci_device() to avoid hard-coded values (Ilpo
  Järvinen)

- Clean up pci_scan_child_bus_extend() loop to avoid hard-coded values
  (Ilpo Järvinen)

- Add a Xeon 6 quirk to disable Extended Tags and limit Max Read Request
  Size to 128B to avoid a performance issue (Ilpo Järvinen)

* pci/enumeration:
  PCI: Add Extended Tag + MRRS quirk for Xeon 6
  PCI: Clean up pci_scan_child_bus_extend() loop
  PCI: Clean up early_dump_pci_device()
  PCI: Use header type defines in pci_setup_device()