MDCNFG
FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
mdcnfg = readl_relaxed(MDCNFG);
sd->mdcnfg = MDCNFG & 0x007f007f;
: "r" (&MDCNFG), "r" (&PPCR), "0" (sd.mdcnfg),