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/board/google/chromebook_samus/samus.c

@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2016 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/cpu.h>
+
+int arch_early_init_r(void)
+{
+	return cpu_run_reference_code();
+}
+
+int board_early_init_f(void)
+{
+	return 0;
+}