LOONGSON2_MMC_REG_DATA
dma_conf.src_addr = host->res->start + LOONGSON2_MMC_REG_DATA,
dma_conf.dst_addr = host->res->start + LOONGSON2_MMC_REG_DATA,
pdes[i].apb_addr = host->res->start + LOONGSON2_MMC_REG_DATA;