hwpstate0: set freq failed patch

Hello,
Would it be possible for this patch to get to 10 before it goes -release?

http://lists.freebsd.org/pipermail/freebsd-stable/2012-May/067758.html

I've tested it on an amd 6600k and it seems to be working, a quick google
search shows other people have had good results on different cpus.

Claudio