ARM: dts: iwg22d: Add /dev/ttySC5 support

Add support for HSCIF1 as /dev/ttySC5, keeping the same naming
scheme adopted by iWave in their BSP release. This interface
uses RTS/CTS.
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Chris Paterson <chris.paterson2@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts

@@ -17,6 +17,7 @@ / {
 
 	aliases {
 		serial3 = &scif4;
+		serial5 = &hscif1;
 		ethernet0 = &avb;
 	};
 
@@ -39,7 +40,20 @@ vccq_sdhi0: regulator-vccq-sdhi0 {
 	};
 };
 
+&hscif1 {
+	pinctrl-0 = <&hscif1_pins>;
+	pinctrl-names = "default";
+
+	uart-has-rtscts;
+	status = "okay";
+};
+
 &pfc {
+	hscif1_pins: hscif1 {
+		groups = "hscif1_data", "hscif1_ctrl";
+		function = "hscif1";
+	};
+
 	scif4_pins: scif4 {
 		groups = "scif4_data_b";
 		function = "scif4";