CONFIG_CPU_S3C2443 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SAMSUNG S3C2443

modulename: irq.ko

and/or

clock.ko

and/or

s3c2443.ko

configname: CONFIG_CPU_S3C2443

Linux Kernel Configuration
└─>SAMSUNG S3C24XX SoCs Support
└─>SAMSUNG S3C2443
In linux kernel since version 2.6.21 (release Date: 2007-04-25)  
Support for the S3C2443 SoC from the S3C24XX line

source code:
/arch/arm/mach-s3c24xx/s3c2443.c


is selected by
CONFIG_MACH_SMDK2443

is depended by
CONFIG_MACH_SMDK2443