Image replicator media uboot imx6ul ng

U-Boot	/u-boot-dtb.bin /SPL	U-Boot binary blob. This will be written to the bootloader area of eMMC. Note that both files are required for U-Boot, if either file is missing then the Image Replicator tool will not write either of them. If the file /SPL.md5 is present on the USB drive, this will be used to verify the data written to disk.