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/microblaze/config.mk

@@ -0,0 +1,21 @@
+#
+# (C) Copyright 2007-2008 Michal Simek
+# Michal SIMEK <monstr@monstr.eu>
+#
+# (C) Copyright 2004 Atmark Techno, Inc.
+# Yasushi SHOJI <yashi@atmark-techno.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+ifeq ($(CROSS_COMPILE),)
+CROSS_COMPILE := mb-
+endif
+
+CONFIG_STANDALONE_LOAD_ADDR ?= 0x80F00000
+
+PLATFORM_CPPFLAGS += -ffixed-r31 -D__microblaze__
+
+ifeq ($(CONFIG_SPL_BUILD),)
+PLATFORM_CPPFLAGS += -fPIC
+endif