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/autoboot.h

@@ -0,0 +1,47 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Add to readline cmdline-editing by
+ * (C) Copyright 2005
+ * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __AUTOBOOT_H
+#define __AUTOBOOT_H
+
+#ifdef CONFIG_AUTOBOOT
+/**
+ * bootdelay_process() - process the bootd delay
+ *
+ * Process the boot delay, boot limit, then get the value of either
+ * bootcmd, failbootcmd or altbootcmd depending on the current state.
+ * Return this command so it can be executed.
+ *
+ * @return command to executed
+ */
+const char *bootdelay_process(void);
+
+/**
+ * autoboot_command() - run the autoboot command
+ *
+ * If enabled, run the autoboot command returned from bootdelay_process().
+ * Also do the CONFIG_MENUKEY processing if enabled.
+ *
+ * @cmd: Command to run
+ */
+void autoboot_command(const char *cmd);
+#else
+static inline const char *bootdelay_process(void)
+{
+	return NULL;
+}
+
+static inline void autoboot_command(const char *s)
+{
+}
+#endif
+
+#endif