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/arch/x86/dts/rtc.dtsi

@@ -0,0 +1,7 @@
+/ {
+	rtc {
+		compatible = "motorola,mc146818";
+		u-boot,dm-pre-reloc;
+		reg = <0x70 2>;
+	};
+};