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/openrisc/config.mk

@@ -0,0 +1,16 @@
+#
+# (C) Copyright 2011
+# Julius Baxter <julius@opencores.org>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+ifeq ($(CROSS_COMPILE),)
+CROSS_COMPILE := or1k-elf-
+endif
+
+# r10 used for global object pointer, already set in OR32 GCC but just to be
+# clear
+PLATFORM_CPPFLAGS += -D__OR1K__ -ffixed-r10
+
+CONFIG_STANDALONE_LOAD_ADDR ?= 0x40000