Automatic software update

Make sure the flashing addresses (‘load’ prop) is correct for your board!

/dts-v1/;
/ {
 description = "Automatic U-Boot update";
 #address-cells = <1>;
 images {
 update-1 {
 description = "U-Boot binary";
 data = /incbin/("./u-boot.bin");
 compression = "none";
 type = "firmware";
 load = <0xFFFC0000>;
 hash-1 {
 algo = "sha256";
 };
 };
 };
};