ARM: rmobile: Add Beacon EmbeddedWorks RZG2H Dev Kit

The Beacon EmbeddedWorks kit is based on the R8A774E1 SoC also
known as the RZ/G2H.

The kit consists of a SOM + Baseboard and supports microSD,
eMMC, Ethernet, a couple celular radios, two CAN interfaces,
Bluetooth and WiFi.  It shares much of the same design as
the RZ/G2M and RZ/G2N dev kits.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/arch/arm/dts/r8a774e1-beacon-rzg2h-kit-u-boot.dtsi b/arch/arm/dts/r8a774e1-beacon-rzg2h-kit-u-boot.dtsi
new file mode 100644
index 0000000..eef200a
--- /dev/null
+++ b/arch/arm/dts/r8a774e1-beacon-rzg2h-kit-u-boot.dtsi
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2020 Compass Electronics Group, LLC
+ */
+
+/ {
+	soc {
+		u-boot,dm-pre-reloc;
+	};
+};
+
+&cpg {
+	u-boot,dm-pre-reloc;
+};
+
+&extal_clk {
+	u-boot,dm-pre-reloc;
+};
+
+&prr {
+	u-boot,dm-pre-reloc;
+};
+
+&extalr_clk {
+	u-boot,dm-pre-reloc;
+};
+
+&sdhi0 {
+	/delete-property/ cd-gpios;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr104;
+	max-frequency = <208000000>;
+};
+
+&sdhi2 {
+	status = "disabled";
+};
+
+&sdhi3 {
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
+};