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/cmd/license.c

@@ -0,0 +1,40 @@
+/*
+ * (C) Copyright 2007 by OpenMoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+/* Licenses/gpl-2.0.txt is currently 18092 bytes in size */
+#define LICENSE_MAX	20480
+
+#include <command.h>
+#include <malloc.h>
+#include <license.h>
+
+int do_license(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	char *dst = malloc(LICENSE_MAX);
+	unsigned long len = LICENSE_MAX;
+
+	if (!dst)
+		return -1;
+
+	if (gunzip(dst, LICENSE_MAX, license_gzip, &len) != 0) {
+		printf("Error uncompressing license text\n");
+		free(dst);
+		return -1;
+	}
+	puts(dst);
+	free(dst);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	license, 1, 1, do_license,
+	"print GPL license text",
+	""
+);