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/test/vboot/sandbox-u-boot.dts

@@ -0,0 +1,10 @@
+/dts-v1/;
+
+/ {
+	model = "Sandbox Verified Boot Test";
+	compatible = "sandbox";
+
+	reset@0 {
+		compatible = "sandbox,reset";
+	};
+};