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/arm/dts/vf-colibri.dtsi

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2014 Toradex AG
+ *
+ * SPDX-License-Identifier:     GPL-2.0+ or X11
+ */
+#include "vf.dtsi"
+
+/ {
+	chosen {
+		stdout-path = &uart0;
+	};
+};
+
+&dspi1 {
+	status = "okay";
+	bus-num = <1>;
+
+	spi_cmd: sspi@0 {
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+};