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/include/ubifs_uboot.h

@@ -0,0 +1,32 @@
+/*
+ * UBIFS u-boot wrapper functions header
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * (C) Copyright 2008-2009
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ *          Adrian Hunter
+ */
+
+#ifndef __UBIFS_UBOOT_H__
+#define __UBIFS_UBOOT_H__
+
+int ubifs_init(void);
+int uboot_ubifs_mount(char *vol_name);
+void uboot_ubifs_umount(void);
+int ubifs_is_mounted(void);
+int ubifs_load(char *filename, u32 addr, u32 size);
+
+int ubifs_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info);
+int ubifs_ls(const char *dir_name);
+int ubifs_exists(const char *filename);
+int ubifs_size(const char *filename, loff_t *size);
+int ubifs_read(const char *filename, void *buf, loff_t offset,
+	       loff_t size, loff_t *actread);
+void ubifs_close(void);
+
+#endif /* __UBIFS_UBOOT_H__ */