CONFIG_EXYNOS4_DEV_DMA is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_EXYNOS4_DEV_DMA (not configurable)

modulename: dma.ko

configname: CONFIG_EXYNOS4_DEV_DMA

Linux Kernel Configuration
└─>SAMSUNG EXYNOS SoCs Support
└─>EXYNOS4_DEV_DMA
In linux kernel since version 3.3 (release Date: 2012-03-18)  
Compile in amba device definitions for DMA controller

source code: