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/arm/dts/tegra186-p2771-0000.dts

@@ -0,0 +1,25 @@
+/dts-v1/;
+
+#include "tegra186.dtsi"
+
+/ {
+	model = "NVIDIA P2771-0000";
+	compatible = "nvidia,p2771-0000", "nvidia,tegra186";
+
+	chosen {
+		stdout-path = &uarta;
+	};
+
+	aliases {
+		sdhci0 = "/sdhci@3460000";
+	};
+
+	memory {
+		reg = <0x0 0x80000000 0x0 0x60000000>;
+	};
+
+	sdhci@3460000 {
+		status = "okay";
+		bus-width = <8>;
+	};
+};