CONFIG_S3C2440_CPUFREQ is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
S3C2440/S3C2442 CPU Frequency scaling support
modulename: cpufreq-s3c2440.ko
configname: CONFIG_S3C2440_CPUFREQ
Linux Kernel Configuration
└─>SAMSUNG S3C24XX SoCs Support
└─>S3C2440/S3C2442 CPU Frequency scaling support
In linux kernel since version 2.6.32 (release Date: 2009-12-02)
CPU Frequency scaling support for S3C2440 and S3C2442 SoC CPUs.