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/freescale/mpc8540ads/Makefile

@@ -0,0 +1,11 @@
+#
+# (C) Copyright 2001-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	+= mpc8540ads.o
+obj-y	+= ddr.o
+obj-y	+= law.o
+obj-y	+= tlb.o