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/tplink_wdr4300_defconfig

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+CONFIG_MIPS=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_DM_SERIAL=y
+CONFIG_DM_SPI=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_ARCH_ATH79=y
+CONFIG_BOARD_TPLINK_WDR4300=y
+CONFIG_DEFAULT_DEVICE_TREE="tplink_wdr4300"
+CONFIG_BOOTDELAY=3
+CONFIG_HUSH_PARSER=y
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_USB=y
+# CONFIG_CMD_FPGA is not set
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_PING=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_CLK=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_ATMEL=y
+CONFIG_SPI_FLASH_EON=y
+CONFIG_SPI_FLASH_GIGADEVICE=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_SST=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_DATAFLASH=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_DM_ETH=y
+CONFIG_AG7XXX=y
+CONFIG_PINCTRL=y
+CONFIG_SYS_NS16550=y
+CONFIG_ATH79_SPI=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_STORAGE=y