From: Anton Blanchard <anton@samba.org>

- Consolidate printing of timebase and cpuinfo in /proc/cpuinfo, there were
  many trivial differences between pseries/iseries/pmac.

- Remove ppc_md.setup_residual, no longer needed

- Fix for processors over 2.147GHz, from Jake Moilanen.  We were using a
  signed int to parse the OF property.

- Set some sane defaults for timebase and processor frequency if we fail to
  get the correct values from OF.