cpufreq not happy on my laptop

[Nate Lawson]

John Baldwin wrote:
> First off, this is the big green laptop that has a desktop P4 in it, so I'm
> aware that this is very much an edge case.  The system does support ACPI duty
> width type throttling and even has the T2 and T3 constants for use with _PSV.
> I tried cpufreq(4) on it with the recent updates and it's not too happy.
> Before the p4tcc driver was added, this is what I got:
> 
> dev.cpu.0.freq_levels: 9999/99999 9999/99999 8749/87499 7499/74999 6249/62499 4999/49999 3749/37499 2499/24999 1249/12499

Ok, I have committed code (rev 1.15 of acpi_perf.c) to not attach 
acpi_perf when it has 9999 as the frequency.  Bruno Ducrot reported some 
systems use 0xffff to indicate this so I added this as well.

Let me know if everything else works ok for you.

-- 
Nate