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/avr32/cpu/Makefile

@@ -0,0 +1,21 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# Copyright (C) 2005-2006 Atmel Corporation.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+extra-y			+= start.o
+
+obj-y			+= cpu.o
+obj-$(CONFIG_SYS_HSDRAMC) += hsdramc.o
+obj-y			+= exception.o
+obj-y			+= cache.o
+obj-y			+= interrupts.o
+obj-$(CONFIG_PORTMUX_PIO) += portmux-pio.o
+obj-$(CONFIG_PORTMUX_GPIO) += portmux-gpio.o
+obj-y += mmc.o
+
+obj-$(if $(filter at32ap700x,$(SOC)),y) += at32ap700x/