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/cpu/armv7/s5p-common/Makefile

@@ -0,0 +1,13 @@
+#
+# Copyright (C) 2009 Samsung Electronics
+# Minkyu Kang <mk7.kang@samsung.com>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y		+= cpu_info.o
+ifndef CONFIG_SPL_BUILD
+obj-y		+= timer.o
+obj-y		+= sromc.o
+obj-$(CONFIG_PWM)	+= pwm.o
+endif