It adds eMMC sample clock HISTB_MMC_SAMPLE_CLK and drive clock
HISTB_MMC_DRV_CLK support for Hi3798cv200 SoC.
Signed-off-by: tianshuliang <tianshuliang@hisilicon.com>
Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>