spacemit_sdhci_clrbits
spacemit_sdhci_clrbits(host, SDHC_TX_INT_CLK_SEL, SPACEMIT_SDHC_TX_CFG_REG);
spacemit_sdhci_clrbits(host, SDHC_ENHANCE_STROBE_EN, SPACEMIT_SDHC_MMC_CTRL_REG);
spacemit_sdhci_clrbits(host, SDHC_PHY_FUNC_EN | SDHC_PHY_PLL_LOCK,
spacemit_sdhci_clrbits(host, SDHC_MMC_HS400 | SDHC_MMC_HS200 | SDHC_ENHANCE_STROBE_EN,
spacemit_sdhci_clrbits(host, SDHC_HS200_USE_RFIFO, SPACEMIT_SDHC_PHY_FUNC_REG);