improve cx_lowest logic

[Vitaly Magerya]

On 08/07/2012, Andriy Gapon <avg at freebsd.org> wrote:
> I would like to propose the following change for review and testing:
> http://people.freebsd.org/~avg/acpi_cpu_cx_lowest.diff

On 13/07/2012, Andriy Gapon <avg at freebsd.org> wrote:
> Many thanks to all who reviewed and tested!
> I've just committed this change.

Andriy, will this change be available in 9.1?

I'm not seeing it in 9.1-RC1, and using my previous workarounds now
that a proper solution is available is a pain.