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

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - bobafetthotmail (bobafetthotmail) 

Attached to Project - LEDE Project
Summary - kirkwood uimages for specific devices built by from source can only be booted with bootz
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - This is true for all kirkwood uimages built by the LEDE system.

Both stock uboot and modern uboot act the same

NSA310> fatload usb 0 0x800000 lede-kirkwood-nsa310-uimage ; bootm 0x800000
reading lede-kirkwood-nsa310-uimage
1868588 bytes read in 83 ms (21.5 MiB/s)
Wrong Image Format for bootm command
Error occured, error code = 112
ERROR: can't get kernel image!

but with bootz works
NSA310> bootz 0x800000
Kernel image @ 0x800000 [ 0x000000 - 0x1c51d8 ]

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.4.19 (alby at openSUSE-xeon) (gcc version 5.4.0 (LEDE GCC 5.4.0 r1480) ) #0 Thu Sep 1 13:01:04 2016
[    0.000000] CPU: Feroceon 88FR131 [56251311] revision 1 (ARMv5TE), cr=0005397f
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] Machine model: ZyXEL NSA310
[    0.000000] Memory policy: Data cache writeback

## and it goes on and on here, not relevant for the bug report


I suspect that this is related to bug 131 https://bugs.lede-project.org/index.php?do=details&task_id=131

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