tsimx6ul-usbprod: Can blast.sh check for correct model in U-Boot for updating U-Boot binary?

[ts-kris]

The imx6 series has a check to ensure the correct binary is being used, this might be able to be expanded to the imx6ul (or other platforms with different binaries). If we implement this, we might also be able to have the filenames on disk be the generic u-boot.imx, or just copy in the full names and let the script decide the correct one to use.