acpi_cpufreq broken after _PDC patch

[Gerhard Schrenk <deb.gschrenk@gmx.de>]

Hi,

commit 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 breaks acpi_cpufreq for
an Intel Centrino notebook with Pentium M 1.60GHz (it's a Medion MD
95600 (aka MSI S260) notebook).

|gps@medusa:~/scratch/kernel-tree$ git bisect bad
|05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 is first bad commit
|diff-tree 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 (from d2149b542382bfc206cb28485108f6470c979566)
|Author: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
|Date:   Sun Oct 23 16:31:00 2005 -0400
|
|    [ACPI] Avoid BIOS inflicted crashes by evaluating _PDC only once
|    
|    Linux invokes the AML _PDC method (Processor Driver Capabilities)
|    to tell the BIOS what features it can handle.  While the ACPI
|    spec says nothing about the OS invoking _PDC multiple times,
|    doing so with changing bits seems to hopelessly confuse the BIOS
|    on multiple platforms up to and including crashing the system.
|    
|    Factor out the _PDC invocation so Linux invokes it only once.
|    
|    http://bugzilla.kernel.org/show_bug.cgi?id=5483
|    
|    Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
|    Signed-off-by: Len Brown <len.brown@intel.com>

The error message is

|gps@medusa:~$ sudo modprobe acpi_cpufreq
|FATAL: Error inserting acpi_cpufreq
|(/lib/modules/2.6.15-rc3-bisect1/kernel/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.ko):
|No such device

Unfortunately 

  git revert 05131ecc99ea9da7f45ba3058fe8a2c1d0ceeab8 

does not work without merge conflict on top of Linus' tree.

-- Gerhard
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