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/board/renesas/alt/Kconfig

@@ -0,0 +1,21 @@
+if TARGET_ALT
+
+config SYS_BOARD
+	default "alt"
+
+config SYS_VENDOR
+	default "renesas"
+
+config SYS_CONFIG_NAME
+	default "alt"
+
+config R8A7794_ETHERNET_B
+	bool "Use ethernet B function"
+	depends on TARGET_ALT
+	default n
+	help
+	  ALT board can use default ethernet and etnernet B function.
+	  This config set pin function of ethenet B. You also needt to change
+	  DIP switch of board in order to use this function.
+
+endif