ARM: dts: iwg23s-sbc: Add pinctl support for scif1

Adding pinctrl support for scif1 interface.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Chris Paterson <chris.paterson2@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a77470-iwg23s-sbc.dts

@@ -43,6 +43,16 @@ &extal_clk {
 	clock-frequency = <20000000>;
 };
 
+&pfc {
+	scif1_pins: scif1 {
+		groups = "scif1_data_b";
+		function = "scif1";
+	};
+};
+
 &scif1 {
+	pinctrl-0 = <&scif1_pins>;
+	pinctrl-names = "default";
+
 	status = "okay";
 };