arm64: dts: Add SEI Robotics SEI510 Board

The SEI Robotics SEI510 Board is based on the Amlogic G12A S905X2
and has the following features :
- Amlogic G12A S905X2 SoC
- 10/100 Ethernet
- USB2 + USB3 ports
- Micro SDCard Port
- Audio + CVBS AV Jack port
- HDMI 2.1 + CEC Port
- ADC Touch Button
- Far-Field Microphone Array + Mono HP
- IR Sensor
- IR Emmiter LED Array
- RGB Led
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
[khilman: sorted Makefile entry alphabetcially]
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

Documentation/devicetree/bindings/arm/amlogic.txt

@@ -110,6 +110,7 @@ Board compatible values (alphabetically, grouped by SoC):
 
   - "amlogic,u200" (Meson g12a s905d2)
   - "amediatech,x96-max" (Meson g12a s905x2)
+  - "seirobotics,sei510" (Meson g12a s905x2)
 
 Amlogic Meson Firmware registers Interface
 ------------------------------------------

arch/arm64/boot/dts/amlogic/Makefile

 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_MESON) += meson-axg-s400.dtb
+dtb-$(CONFIG_ARCH_MESON) += meson-g12a-sei510.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-g12a-u200.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-g12a-x96-max.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nanopi-k2.dtb

arch/arm64/boot/dts/amlogic/meson-g12a-sei510.dts

+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2019 BayLibre SAS. All rights reserved.
+ */
+
+/dts-v1/;
+
+#include "meson-g12a.dtsi"
+
+/ {
+	compatible = "seirobotics,sei510", "amlogic,g12a";
+	model = "SEI Robotics SEI510";
+
+	aliases {
+		serial0 = &uart_AO;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x40000000>;
+	};
+
+	reserved-memory {
+		/* TEE Reserved Memory */
+		bl32_reserved: bl32@5000000 {
+			reg = <0x0 0x05300000 0x0 0x2000000>;
+			no-map;
+		};
+	};
+};
+
+&uart_AO {
+	status = "okay";
+};