MEM_DDR
pvt->dram_type = (pvt->dclr0 & BIT(18)) ? MEM_DDR : MEM_RDDR;
[MEM_DDR] = "Unbuffered-DDR",
mtype = MEM_DDR;
dimm->mtype = MEM_DDR;
dimm->mtype = MEM_DDR;
dimm->mtype = MEM_DDR;
#define MEM_FLAG_DDR BIT(MEM_DDR)