ARM: dts: renesas: Add R8A77980 V3H DTs and headers

Import R8A77980 V3H DTs and headers from Linux 5.2.7 , commit 5697a9d3d55f.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/dts/r8a77980-u-boot.dtsi b/arch/arm/dts/r8a77980-u-boot.dtsi
new file mode 100644
index 0000000..1050f6e
--- /dev/null
+++ b/arch/arm/dts/r8a77980-u-boot.dtsi
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source extras for U-Boot on RCar R8A77980 SoC
+ *
+ * Copyright (C) 2019 Marek Vasut <marek.vasut@gmail.com>
+ */
+
+#include "r8a779x-u-boot.dtsi"
+
+&extalr_clk {
+	u-boot,dm-pre-reloc;
+};
+
+/ {
+	soc {
+		rpc: rpc@0xee200000 {
+			compatible = "renesas,rpc-r8a77980", "renesas,rpc";
+			reg = <0 0xee200000 0 0x100>, <0 0x08000000 0 0>;
+			clocks = <&cpg CPG_MOD 917>;
+			bank-width = <2>;
+			status = "disabled";
+		};
+	};
+};