[0/3] Add RapidIO support to powerpc architecture with memory mapping

Hi,

Those patches add RapidIO support to powerpc archiecture with
memory mapping as below:

[1/3] Copy the arch/ppc RapidIO support to arch/powerpc
[2/3] Make the arch/powerpc RapidIO support workable with of-device
      and add memory mapping support.
[3/3] Add the memory mapping support to rionet driver.

Best Regards,
Zhang Wei