Patch from Matthew Wilcox:
  Since some ia64 platforms have non-identity-mapped PCI busses, we need
  to implement pcibios_resource_to_bus and pcibios_bus_to_resource.
  Also clean up some >80 column comments and delete an unnecessary parameter
  to pcibios_fixup_device_resources().
Signed-off-by: Tony Luck <tony.luck@intel.com>