GRF_EMMCPHY_CON6
HWRITE4(sc, GRF_EMMCPHY_CON6, GRF_EMMCPHY_CON6_DR_CLR | impedance);
HWRITE4(sc, GRF_EMMCPHY_CON6,
HWRITE4(sc, GRF_EMMCPHY_CON6, GRF_EMMCPHY_CON6_PDB_CLR |
HWRITE4(sc, GRF_EMMCPHY_CON6, GRF_EMMCPHY_CON6_ENDLL_CLR |