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/tools/pbl_crc32.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef PBLCRC32_H
+#define PBLCRC32_H
+
+#include <stdint.h>
+uint32_t pbl_crc32(uint32_t in_crc, const char *buf, uint32_t len);
+
+#endif