default or selected kernelversion does not have config value CONFIG_ARM_SA1100_CPUFREQ.
Result is shown for kernelversion 6.9.9

CONFIG_ARM_SA1100_CPUFREQ (not configurable)

modulename: sa1100-cpufreq.ko

configname: CONFIG_ARM_SA1100_CPUFREQ

Linux Kernel Configuration
└─>Power management and ACPI options
└─>CPU Frequency scaling
└─>ARM_SA1100_CPUFREQ
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/cpufreq/sa1100-cpufreq.c