arm: rmobile: Add HopeRun HiHope RZ/G2H board support

The HiHope RZ/G2H board from HopeRun consists of main board
(HopeRun HiHope RZ/G2H main board) and sub board(HopeRun
HiHope RZ/G2H sub board). The HiHope RZ/G2H sub board sits
below the HiHope RZ/G2H main board.

This patch adds the required board support to boot HopeRun HiHope
RZ/G2H board.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
diff --git a/arch/arm/dts/r8a774e1-u-boot.dtsi b/arch/arm/dts/r8a774e1-u-boot.dtsi
new file mode 100644
index 0000000..74758df
--- /dev/null
+++ b/arch/arm/dts/r8a774e1-u-boot.dtsi
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source extras for U-Boot on RZ/G2 R8A774E1 SoC
+ *
+ * Copyright (C) 2020 Renesas Electronics Corp.
+ */
+
+#include "r8a779x-u-boot.dtsi"
+
+&extalr_clk {
+	u-boot,dm-pre-reloc;
+};
+
+/delete-node/ &audma0;
+/delete-node/ &audma1;
+/delete-node/ &can0;
+/delete-node/ &can1;
+/delete-node/ &canfd;
+/delete-node/ &csi20;
+/delete-node/ &csi40;
+/delete-node/ &du;
+/delete-node/ &fcpf0;
+/delete-node/ &fcpf1;
+/delete-node/ &fcpvb0;
+/delete-node/ &fcpvb1;
+/delete-node/ &fcpvd0;
+/delete-node/ &fcpvd1;
+/delete-node/ &fcpvi0;
+/delete-node/ &fcpvi1;
+/delete-node/ &hdmi0;
+/delete-node/ &lvds0;
+/delete-node/ &rcar_sound;
+/delete-node/ &sdhi2;
+/delete-node/ &sound_card;
+/delete-node/ &vin0;
+/delete-node/ &vin1;
+/delete-node/ &vin2;
+/delete-node/ &vin3;
+/delete-node/ &vin4;
+/delete-node/ &vin5;
+/delete-node/ &vin6;
+/delete-node/ &vin7;
+/delete-node/ &vspbc;
+/delete-node/ &vspbd;
+/delete-node/ &vspd0;
+/delete-node/ &vspd1;
+/delete-node/ &vspi0;
+/delete-node/ &vspi1;
+
+/ {
+	/delete-node/ hdmi0-out;
+};
+
+/ {
+	soc {
+		/delete-node/ fdp1@fe940000;
+		/delete-node/ fdp1@fe944000;
+	};
+};