arm64: dts: renesas: r8a77995: update PFC node name to pin-controller

This patch changes the name from from e6060000.pfc and pfc@e6060000 to
e6060000.pin-controller and pin-controller@e6060000 like other Renesas
SoCs.
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a77995.dtsi

@@ -122,7 +122,7 @@ rst: reset-controller@e6160000 {
 			reg = <0 0xe6160000 0 0x0200>;
 		};
 
-		pfc: pfc@e6060000 {
+		pfc: pin-controller@e6060000 {
 			compatible = "renesas,pfc-r8a77995";
 			reg = <0 0xe6060000 0 0x508>;
 		};