arm64: dts: renesas: Add Renesas R8A779G2 SoC support

Add support for the Renesas R-Car V4H ES2.0 (R8A779G2) SoC, which is an
updated version of the R-Car V4H (R8A779G0) SoC.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/4f773dbb66af5da51d1e171424ec8f97ee933b36.1706192990.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a779g2.dtsi

+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Device Tree Source for the R-Car V4H (R8A779G2) SoC
+ *
+ * Copyright (C) 2023 Glider bv
+ */
+
+#include "r8a779g0.dtsi"
+
+/ {
+	compatible = "renesas,r8a779g2", "renesas,r8a779g0";
+};