CONFIG_SH_DMA is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

DMA controller (DMAC) support

modulename: dma.ko

and/or

dma-sh.ko

configname: CONFIG_SH_DMA

Linux Kernel Configuration
└─>DMA support
└─>DMA controller (DMAC) support
In linux kernel since version 2.6.12  
Selecting this option will provide same API as PC's Direct Memory
Access Controller(8237A) for SuperH DMAC.

If unsure, say N.

source code:
arch/sh/drivers/dma/dma-sh.c
depends
 or CONFIG_CPU_SH3 or CONFIG_CPU_SH4

is selected by
CONFIG_SH_DMAE_BASE