MAINTAINERS: Add Renesas RZ/A and RZ/N files to Renesas pinctrl section

Add paths for the Renesas RZ/A and RZ/N series pin controller drivers,
as they are not under sh-pfc/, but still maintained with the other
Renesas pin controller drivers.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

MAINTAINERS

@@ -11754,6 +11754,7 @@ M:	Geert Uytterhoeven <geert+renesas@glider.be>
 L:	linux-renesas-soc@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git sh-pfc
 S:	Maintained
+F:	drivers/pinctrl/pinctrl-rz*
 F:	drivers/pinctrl/sh-pfc/
 
 PIN CONTROLLER - SAMSUNG