85xxCDS: MPC8548CDS Updates and Bug Fixes

Greetings,
This patch series contains updates to the MPC8548CDS DTS
and fixes several PCI-related bugs. I'm not 100% sure the DTS changes are in the proper form, so I'd appreciate any corrections. Note that some of these patches have been posted previously.

These patches are based on Kumar's for_paulus branch.

Thanks,
Randy Vinson