CONFIG_PPC_PASEMI_CPUFREQ is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

Support for PA Semi PWRficient

modulename: cpufreq.ko

configname: CONFIG_PPC_PASEMI_CPUFREQ

Linux Kernel Configuration
└─>Platform support
└─>CPU Frequency drivers
└─>Support for PA Semi PWRficient
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
This adds the support for frequency switching on PA Semi
PWRficient processors.

source code:
arch/powerpc/platforms/pasemi/cpufreq.c
selects
CONFIG_CPU_FREQ_TABLE

depends
CONFIG_CPU_FREQ
CONFIG_PPC_PASEMI