arm64: dts: renesas: ulcb-kf: Add HSCIF1 node

Exposed on CN4. Tested by connecting it to a Renesas Ebisu board.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230525084823.4195-3-wsa+renesas@sang-engineering.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/ulcb-kf.dtsi

@@ -10,6 +10,7 @@ / {
 	aliases {
 		serial1 = &hscif0;
 		serial2 = &scif1;
+		serial3 = &hscif1;
 		mmc2 = &sdhi3;
 	};
 
@@ -114,6 +115,14 @@ &hscif0 {
 	status = "okay";
 };
 
+&hscif1 {
+	pinctrl-0 = <&hscif1_pins>;
+	pinctrl-names = "default";
+	uart-has-rtscts;
+
+	status = "okay";
+};
+
 &hsusb {
 	dr_mode = "otg";
 	status = "okay";
@@ -366,6 +375,11 @@ hscif0_pins: hscif0 {
 		function = "hscif0";
 	};
 
+	hscif1_pins: hscif1 {
+		groups = "hscif1_data_a", "hscif1_ctrl_a";
+		function = "hscif1";
+	};
+
 	scif1_pins: scif1 {
 		groups = "scif1_data_b";
 		function = "scif1";