I initially tried it because the module packaging stated it used a ATMega328 processor. Additionally, because it was the only image that successfully loaded. The image you mentioned wasn't part of the current install package apparently (not present in the "firmwares" directory). I'll track it...
Been working on setting up my first BrewPi but I'm stuck at getting the Aruduino module to reply with version info. I'm using a clone module (Inland - UNO R3, ATMega-328-based ) and checking the board info with IDE, I got:
BN: Arduino/Genuino Uno
VID: 2341
PID: 0043
SN:75435353934351704230...