mmc: sdhci-npcm: Add NPCM SDHCI driver

Add Nuvoton NPCM BMC sdhci-pltfm controller driver.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20231002200610.129799-3-tmaimon77@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>