Thanks MikeWebb, i got back the missing arg's for u-boot, without re-adding the extra crap that emc added. I get it to boot normally again
now back to my initial problem to figure out why the initialization of the ports fail while starting up (first image).
Edit: Lets see if anything changes when changing the profile type (ib, ib-single-switch, ib-no-adaptive-routing-single-switch, eth-single-switch, vpi-single-switch)
Edit 2: Nope, no change. however, new options are available via cli
Edit 3: Looks like its still a no go. I definitely need to do the firmware update, as the mlnx-os cant see the asic ('show asic-version' from cli shows nothing in the display)