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/include/asm/arch-tegra20/pmu.h

@@ -0,0 +1,14 @@
+/*
+ *  (C) Copyright 2010,2011
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _ARCH_PMU_H_
+#define _ARCH_PMU_H_
+
+/* Set core and CPU voltages to nominal levels */
+int pmu_set_nominal(void);
+
+#endif	/* _ARCH_PMU_H_ */