r302951:
  OFWPCI: Improve resource handling.  - add new rman for prefetchable memory.
  Is used only if given 'ranges'
    property contains prefetchable memory range.
r302952:
  OFWPCI: Add support for NEW_PCIB.
r304071:
  OFWPCI: Don't strip RF_ACTIVE from flags when parent bus method is called.