This is just a finisher task for MEN-1390, MEN-1388 and MEN-1389, since they can't easily be merged independently. I will close them as they are finished on my local branch, and merge them using this task.
is blocked by
MEN-1388Provide our own bootcmd instead of merging with existing
MEN-1389Autodetect kernel and dtb files while constructing bootargs/bootcmd