DWCMSHC_EMMC_DLL_CTRL
sdhci_writel(host, DWCMSHC_EMMC_DLL_BYPASS | DWCMSHC_EMMC_DLL_START, DWCMSHC_EMMC_DLL_CTRL);
sdhci_writel(host, BIT(1), DWCMSHC_EMMC_DLL_CTRL);
sdhci_writel(host, 0x0, DWCMSHC_EMMC_DLL_CTRL);
sdhci_writel(host, extra, DWCMSHC_EMMC_DLL_CTRL);