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/arm/mach-at91/arm926ejs/Makefile

@@ -0,0 +1,28 @@
+#
+# (C) Copyright 2000-2008
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-$(CONFIG_AT91SAM9260)	+= at91sam9260_devices.o
+obj-$(CONFIG_AT91SAM9G20)	+= at91sam9260_devices.o
+obj-$(CONFIG_AT91SAM9XE)	+= at91sam9260_devices.o
+obj-$(CONFIG_AT91SAM9261)	+= at91sam9261_devices.o
+obj-$(CONFIG_AT91SAM9G10)	+= at91sam9261_devices.o
+obj-$(CONFIG_AT91SAM9263)	+= at91sam9263_devices.o
+obj-$(CONFIG_AT91SAM9RL)	+= at91sam9rl_devices.o
+obj-$(CONFIG_AT91SAM9M10G45)	+= at91sam9m10g45_devices.o
+obj-$(CONFIG_AT91SAM9G45)	+= at91sam9m10g45_devices.o
+obj-$(CONFIG_AT91SAM9N12)	+= at91sam9n12_devices.o
+obj-$(CONFIG_AT91SAM9X5)	+= at91sam9x5_devices.o
+obj-$(CONFIG_AT91_EFLASH)	+= eflash.o
+obj-$(CONFIG_AT91_LED)	+= led.o
+obj-y += clock.o
+obj-y += cpu.o
+obj-y	+= reset.o
+obj-y	+= timer.o
+
+ifndef CONFIG_SKIP_LOWLEVEL_INIT
+obj-y	+= lowlevel_init.o
+endif