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

SuperH DMA API support

modulename: dma-sh.ko

configname: CONFIG_SH_DMA_API

Linux Kernel Configuration
└─>DMA support
└─>SuperH DMA API support
In linux kernel since version 2.6.22 (release Date: 2007-07-08)  
SH_DMA_API always enabled DMA API of used SuperH.
If you want to use DMA ENGINE, you must not enable this.
Please enable DMA_ENGINE and SH_DMAE.

source code:
depends
CONFIG_SH_DMA

is selected by
CONFIG_SH_DMAE_BASE

is depended by
CONFIG_G2_DMA