Reserve one image id for padding (#148)
Reserve one image id for padding (#148)

BF3 requires some extra data in the boot partition to read in
order to terminate the eMMC FSM when booting from eMMC. This
change is added for this purpose.

Co-authored-by: Liming Sun <8c82ad08b84dd8373e287e5c0c5fd12b12e37fc3@nvidia.com>
Mellanox/bfscripts,Mellanox/bfscripts