Add YAML devicetree binding for RDA Micro GPIO controller.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20191021064413.19840-2-manivannan.sadhasivam@linaro.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>