CONFIG_S3C24XX_DCLK is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_S3C24XX_DCLK (not configurable)

modulename: clock-dclk.ko

configname: CONFIG_S3C24XX_DCLK

Linux Kernel Configuration
└─>SAMSUNG S3C24XX SoCs Support
└─>S3C24XX_DCLK
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Clock code for supporting DCLK/CLKOUT on S3C24XX architectures

source code: