PowerNow! for AMD Family 10h/11h

[FUKAUMI Naoki <naoki%fukaumi.org@localhost>]

hi

I wrote ad-hoc patch to support PowerNow! on AMD Family 10h/11h cpus.

  http://www.naobsd.org/t105/hwpstate.diff

of course it must be improved. (e.g. separate from powernow_k8.c, sysctl
node naming, etc)

I've tested following cpus:

  "Quad-Core AMD Opteron(tm) Processor 1352"
  "AMD Turion(tm) X2 Ultra Dual-Core Mobile ZM-82"

--
FUKAUMI Naoki