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/arch/avr32/include/asm/sections.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#ifndef __ASM_AVR32_SECTIONS_H
+#define __ASM_AVR32_SECTIONS_H
+
+#include <asm-generic/sections.h>
+
+/* References to section boundaries */
+
+extern char __data_lma[], __edata_lma[];
+extern char __got_start[], __got_lma[], __got_end[];
+
+#endif /* __ASM_AVR32_SECTIONS_H */