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/drivers/clk/exynos/clk-pll.h

@@ -0,0 +1,9 @@
+/*
+ * Exynos PLL helper functions for clock drivers.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+unsigned long pll145x_get_rate(unsigned int *con1, unsigned long fin_freq);