Summary of changes:
- alpha, arm: code related to PCI-PCI bridges from pcibios_fixup_bus()
  removed - now it's generic;
- pdev_sort_resource: sort resources all together, no matter IO or memory;
- pbus_assign_resources_sorted: ditto;
- pci_bridge_check_ranges, pci_setup_bridge: changed for prefetch support;
- pbus_size_io, pbus_size_mem: core stuff; tested with randomly generated
  sets of resources;
- pbus_size_bridges: pass #2 (pass #1 is PCI probing, common for all archs);
- pbus_assign_resources: pass #3.

Ivan.