CONFIG_CPU_FREQ_S3C is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_FREQ_S3C (not configurable)

configname: CONFIG_CPU_FREQ_S3C

Linux Kernel Configuration
└─>CPU Power Management
└─>CPU_FREQ_S3C
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
Internal configuration node for common cpufreq on Samsung SoC