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/mips/cpu/interrupts.c

@@ -0,0 +1,22 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+int interrupt_init(void)
+{
+	return 0;
+}
+
+void enable_interrupts(void)
+{
+}
+
+int disable_interrupts(void)
+{
+	return 0;
+}