CONFIG_CPU_S3C2442 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SAMSUNG S3C2442

modulename: s3c2442.ko

configname: CONFIG_CPU_S3C2442

Linux Kernel Configuration
└─>SAMSUNG S3C24XX SoCs Support
└─>SAMSUNG S3C2442
In linux kernel since version 2.6.18 (release Date: 2006-09-19)  
Support for S3C2442 Samsung Mobile CPU based systems.

source code: