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/tegra-common-usb-gadget.h

@@ -0,0 +1,29 @@
+/*
+ * (C) Copyright 2014
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0
+ */
+
+#ifndef _TEGRA_COMMON_USB_GADGET_H_
+#define _TEGRA_COMMON_USB_GADGET_H_
+
+#ifndef CONFIG_SPL_BUILD
+/* USB gadget mode support*/
+#define CONFIG_CI_UDC_HAS_HOSTPC
+/* USB mass storage protocol */
+#define CONFIG_USB_FUNCTION_MASS_STORAGE
+/* DFU protocol */
+#define CONFIG_USB_FUNCTION_DFU
+#define CONFIG_SYS_DFU_DATA_BUF_SIZE SZ_1M
+#define CONFIG_SYS_DFU_MAX_FILE_SIZE SZ_32M
+#ifdef CONFIG_MMC
+#define CONFIG_DFU_MMC
+#endif
+#ifdef CONFIG_SPI_FLASH
+#define CONFIG_DFU_SF
+#endif
+#define CONFIG_DFU_RAM
+#endif
+
+#endif /* _TEGRA_COMMON_USB_GADGET_H_ */