We need to express the following

  * How to install the uboot bits
    * UFS partition and size
    * MSDOSFS partition and size
    * EFI partition and size
    * Reserved space at the beginning (for dd'ing in blocks)
    * Mix of the above

Use UCL to express:
  * List of files go to a destination via copy or dd..
  * Partition layout / types / sizes

Something like

<code>
config_version = 1
board = "All BeagleBone Boards"
reserved = "2MB"
hasFat = "yes"
fatType = "fat32"
fatSize = 2MB
fatPartType = "!16"
fatFiles = ["u-boot.img" "uBootEnv.txt" ]
hasUFS = "yes"
fixedData = "yes"
fixedSize = 128k
fixedLocations = [ 0x100, 0x200, 0x300 ]
fixedFile = "u-boot-spl.img"
</code>