[FS#139] kirkwood uimages for specific devices built by from source can only be booted with bootz

[LEDE Bugs]

The following task is now closed:

FS#139 - kirkwood uimages for specific devices built by from source can only be booted with bootz
User who did this - Ted Hess (thess)

Reason for closing: Fixed
More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=139