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/common/board_info.c

@@ -0,0 +1,31 @@
+/*
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <libfdt.h>
+#include <linux/compiler.h>
+
+int __weak checkboard(void)
+{
+	return 0;
+}
+
+/*
+ * If the root node of the DTB has a "model" property, show it.
+ * Then call checkboard().
+ */
+int show_board_info(void)
+{
+#if defined(CONFIG_OF_CONTROL) && !defined(CONFIG_CUSTOM_BOARDINFO)
+	DECLARE_GLOBAL_DATA_PTR;
+	const char *model;
+
+	model = fdt_getprop(gd->fdt_blob, 0, "model", NULL);
+
+	if (model)
+		printf("Model: %s\n", model);
+#endif
+
+	return checkboard();
+}