arm: dts: rmobile: r8a774b1: Synchronize DTs with Linux 5.11

Synchronize r8a774b1 device trees with Linux 5.11,
commit f40ddce88593482919 ("Linux 5.11")

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
diff --git a/arch/arm/dts/r8a774b1-hihope-rzg2n.dts b/arch/arm/dts/r8a774b1-hihope-rzg2n.dts
new file mode 100644
index 0000000..f1883cb
--- /dev/null
+++ b/arch/arm/dts/r8a774b1-hihope-rzg2n.dts
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the HiHope RZ/G2N main board Rev.3.0/4.0
+ *
+ * Copyright (C) 2020 Renesas Electronics Corp.
+ */
+
+/dts-v1/;
+#include "r8a774b1.dtsi"
+#include "hihope-rev4.dtsi"
+
+/ {
+	model = "HopeRun HiHope RZ/G2N main board based on r8a774b1";
+	compatible = "hoperun,hihope-rzg2n", "renesas,r8a774b1";
+
+	memory@48000000 {
+		device_type = "memory";
+		/* first 128MB is reserved for secure area. */
+		reg = <0x0 0x48000000 0x0 0x78000000>;
+	};
+
+	memory@480000000 {
+		device_type = "memory";
+		reg = <0x4 0x80000000 0x0 0x80000000>;
+	};
+};
+
+&du {
+	clocks = <&cpg CPG_MOD 724>,
+		 <&cpg CPG_MOD 723>,
+		 <&cpg CPG_MOD 721>,
+		 <&versaclock5 1>,
+		 <&x302_clk>,
+		 <&versaclock5 2>;
+	clock-names = "du.0", "du.1", "du.3",
+		      "dclkin.0", "dclkin.1", "dclkin.3";
+};
+
+&sdhi3 {
+	mmc-hs400-1_8v;
+};