CONFIG_S3C2412_DMA is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_S3C2412_DMA.
Result is shown for kernelversion 6.5.1

CONFIG_S3C2412_DMA (not configurable)

modulename: dma-s3c2412.ko

configname: CONFIG_S3C2412_DMA

Linux Kernel Configuration
└─>SAMSUNG S3C24XX SoCs Support
└─>S3C2412_DMA
In linux kernel since version 2.6.21 (release Date: 2007-04-25)  
Internal config node for S3C2412 DMA support

source code:
arch/arm/mach-s3c24xx/dma-s3c2412.c

is depended by
CONFIG_CPU_S3C2412