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/configs/smdk5420_defconfig

@@ -0,0 +1,42 @@
+CONFIG_ARM=y
+CONFIG_ARCH_EXYNOS=y
+CONFIG_ARCH_EXYNOS5=y
+CONFIG_TARGET_SMDK5420=y
+CONFIG_DM_I2C=y
+CONFIG_DEFAULT_DEVICE_TREE="exynos5420-smdk5420"
+CONFIG_SPL=y
+CONFIG_FIT=y
+CONFIG_FIT_BEST_MATCH=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="SMDK5420 # "
+CONFIG_CMD_BOOTZ=y
+# CONFIG_CMD_IMLS is not set
+CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_GPIO=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_DM_I2C_COMPAT=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_REGULATOR=y
+CONFIG_EXYNOS_SPI=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_DWC3=y
+CONFIG_VIDEO_BRIDGE=y