arm64: dts: renesas: r8a77990: Add PFC device node

This patch adds PFC device node for r8a77990 (R-Car E3).
Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a77990.dtsi

@@ -60,6 +60,11 @@
 		#size-cells = <2>;
 		ranges;
 
+		pfc: pin-controller@e6060000 {
+			compatible = "renesas,pfc-r8a77990";
+			reg = <0 0xe6060000 0 0x508>;
+		};
+
 		cpg: clock-controller@e6150000 {
 			compatible = "renesas,r8a77990-cpg-mssr";
 			reg = <0 0xe6150000 0 0x1000>;