Adds support for the pin and gpio controller found in R7S9210 (RZ/A2) SoCs. Signed-off-by: Chris Brandt <chris.brandt@renesas.com> Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>