mmc: hi6220-dwmmc: handle clocks and resets if CONFIG_CLK and CONFIG_DM_RESET enabled

This can avoid hardcoding a clock rate in driver. Also can enable the
clocks and deassert the resets if the pre-bootloader does not do this
for us.

Currently only enabled for Hi3798MV200.

Signed-off-by: Yang Xiwen <forbidden405@outlook.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
1 file changed