arm64:dts:tr8p: Add initial trizeps8plus V1R3 devicetree with pconxs

Use all includes 'as is'. No touch and display support yet and further
things are missing.

arch/arm64/boot/dts/seconorth/seconorth-trizeps8plus_v1r3-pconxs_v3-atm0700.dts

+/*
+ * Copyright 2020 Keith & Koep GmbH
+ *
+ */
+
+/dts-v1/;
+
+// Add defines here, which control behaviour of .dtsi:
+#define ETHERNET_ONLY_100MBIT       0
+#define DISPLAY_ONLY_18BPP          1
+
+#include "trizeps8plus_v1r3.dtsi"
+#include "pconxs.dtsi"
+//#include "atm0700.dtsi"
+//#include "ov5640.dtsi"
+
+/ {
+	model      = "SECO pConXS III ATM0700 i.MX8MP Trizeps8-Plus";
+	compatible = "seco,trizeps8plus", "fsl,imx8mp-evk", "fsl,imx8mp";
+
+	chosen {
+		stdout-path = &uart1;
+	};
+
+	aliases {
+		rtc0 = &rtc;
+		rtc1 = &snvs_rtc;
+	};
+};
+
+#if 0
+
+&usbotg1 {
+	dr_mode = "host";
+	status = "okay";
+};
+#endif