Recompile U-boot

I am using the gadget snap found at this location pi-gadget. I would like to disable the uboot console output.

Is there a recommended gadget snap with for the same?

as we found out together already, this gadget is really hard to modify (using only deb binaries), i’ll try to cook up some special tree that boots without any serial console enabled and uses upstream u-boot from source, i’ll post the link here once it is ready …