avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/arch/mips/dts/skeleton.dtsi

@@ -0,0 +1,23 @@
+/*
+ * Skeleton device tree; the bare minimum needed to boot; just include and
+ * add a compatible value.  The bootloader will typically populate the memory
+ * node.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	chosen {
+	};
+
+	aliases {
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0 0>;
+	};
+};