patch: enable MSR support for EST

[Eric Anderson]

Nate Lawson wrote:
> The attached patch calls an acpi 3.0 method that on some laptops, 
> exposes the SpeedStep MSRs via the acpi_perf driver.  If you have a 
> laptop that supports SpeedStep but it doesn't appear to work right, 
> please try this patch and see if it fixes things.

Nate - I'm currently running on this patch (since you posted it), and haven't noticed any ill effects, and not a lot changed on my laptop.  I'm not really certain if it should change anything for me, but I applied it as a test bed for you.  

My recent bootup dmesg, acpi stuff, etc, is located here:

http://googlebit.com/freebsd/

Eric



-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
A lost ounce of gold may be found, a lost moment of time never.
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