Use DMA transfers only

configname: CONFIG_MMC_S3C_DMA

Samsung S3C SD/MMC transfer code
└─>Use DMA transfers only
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
Use DMA to transfer data between memory and the hardare.

Currently, the DMA support in this driver seems to not be
working properly and needs to be debugged before this
option is useful.