MAINTAINERS: Renesas Pin Controllers are supported

Change "PIN CONTROLLER - RENESAS" section from Maintained to Supported.
This brings it in line with my other "+renesas" entries.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200518081836.23890-1-geert+renesas@glider.be

MAINTAINERS

@@ -13344,7 +13344,7 @@ F:	drivers/pinctrl/qcom/
 PIN CONTROLLER - RENESAS
 M:	Geert Uytterhoeven <geert+renesas@glider.be>
 L:	linux-renesas-soc@vger.kernel.org
-S:	Maintained
+S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git sh-pfc
 F:	Documentation/devicetree/bindings/pinctrl/renesas,*
 F:	drivers/pinctrl/pinctrl-rz*