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/drivers/mtd/mtd-uclass.c

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <mtd.h>
+
+/*
+ * Implement a MTD uclass which should include most flash drivers.
+ * The uclass private is pointed to mtd_info.
+ */
+
+UCLASS_DRIVER(mtd) = {
+	.id		= UCLASS_MTD,
+	.name		= "mtd",
+	.per_device_auto_alloc_size = sizeof(struct mtd_info),
+};