Add the documentation for Richtek rtq6056. Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/1658242365-27797-2-git-send-email-u0084500@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>