ARM: shmobile: Configure r8a7791 PFC on Koelsch via DTS

Configure the "D" set of data signals for SCIF0 and SCIF1
on the Koelsch board to setup pinctrl serial console bits.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7791-koelsch-reference.dts

@@ -30,3 +30,18 @@ lbsc {
 		#size-cells = <1>;
 	};
 };
+
+&pfc {
+	pinctrl-0 = <&scif0_pins &scif1_pins>;
+	pinctrl-names = "default";
+
+	scif0_pins: serial0 {
+		renesas,groups = "scif0_data_d";
+		renesas,function = "scif0";
+	};
+
+	scif1_pins: serial1 {
+		renesas,groups = "scif1_data_d";
+		renesas,function = "scif1";
+	};
+};