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/include/configs/p2771-0000.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2013-2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _P2771_0000_H
+#define _P2771_0000_H
+
+#include <linux/sizes.h>
+
+#include "tegra186-common.h"
+
+/* High-level configuration options */
+#define CONFIG_TEGRA_BOARD_STRING	"NVIDIA P2771-0000"
+
+/* SD/MMC */
+#define CONFIG_MMC
+#define CONFIG_GENERIC_MMC
+#define CONFIG_TEGRA_MMC
+
+/* Environment in eMMC, at the end of 2nd "boot sector" */
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_SYS_MMC_ENV_DEV		0
+#define CONFIG_SYS_MMC_ENV_PART		2
+#define CONFIG_ENV_OFFSET		(-CONFIG_ENV_SIZE)
+
+#include "tegra-common-post.h"
+
+/* Crystal is 38.4MHz. clk_m runs at half that rate */
+#define COUNTER_FREQUENCY	19200000
+
+#endif