Add a compatible string for Nuvoton BMC NPCM845 ADC. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220713132640.215916-2-tmaimon77@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>