DWCMSHC_HOST_CTRL3
extra = sdhci_readb(host, dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3);
sdhci_writeb(host, extra, dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3);
sdhci_writel(host, 0x0, dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3);
reg = dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3;
sdhci_writel(host, 0x0, dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3);