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/post/lib_powerpc/Makefile

@@ -0,0 +1,13 @@
+#
+# (C) Copyright 2002-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y += asm.o
+obj-y += cpu.o cmp.o cmpi.o two.o twox.o three.o threex.o
+obj-y += threei.o andi.o srawi.o rlwnm.o rlwinm.o rlwimi.o
+obj-y += store.o load.o cr.o b.o multi.o string.o complex.o
+
+obj-y += fpu/