Use ACPI _PSS data to determine valid frequency and voltage pairs on Enhanced
SpeedStep-capable processors. An original form of such ACPI-PentiumM-cpufreq
interaction was sent to the cpufreq list by David Moore in June last year; the
attached patch utilizes his code to set _PDC.
                                                                                                   
The new ACPI "P-States library" is utilized to obtain the correct frequency
and MSR value pairs for the speedstep-centrino driver. Only if no such proper
table exists (!CONFIG_ACPI, broken ACPI tables, etc.), fall back to the
existing hard-coded table.
                                                                                                   
If anyone has a better idea for the Kconfig section, please tell me so.
                                                                                                   
This version of this patch has proper acpi_state setting included, and also
has a hint in the banner of the centrino_cpu_init_acpi() function, as Jeremey
Fitzhardinge suggested.