System fails to boot with zfs root on nvme mirror when not using full disks

[Markus Wild]

I have found the problem... I seem to be a victim of https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221075

I wasn't able to get the system to boot just by using /dev/nvd0p3 and /dev/nvd1p3 (avoiding labels), but I
did succeed with a custom kernel as per the PR:

include GENERIC

ident NOMMC
nodevice mmc
nodevice mmcsd
nodevice sdhci


So, there is indeed a problem with that part...

Cheers,
Markus