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

Enable system DMA driver for NVIDIA Tegra SoCs

modulename: dma.ko

configname: CONFIG_TEGRA_SYSTEM_DMA

Linux Kernel Configuration
└─>Enable system DMA driver for NVIDIA Tegra SoCs
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
Adds system DMA functionality for NVIDIA Tegra SoCs, used by
several Tegra device drivers

source code:
/arch/arm/mach-tegra/