devmatch: Actually ignore fields tagged as '#'

[val_packett.cool]

Summary

None of the iflib based drivers were being matched by devmatch, because
the ignore fields were not actually ignored. strcmp does compare
the null terminator, so only strcmp("I:#" + 2, "#") would actually
return 0, but e.g. strcmp("I:#;" + 2, "#") returns 1.

Fixes: 5dedd2517db3 ("devmatch: Ignore the pnp fields tagged as ignore ('#')")

Test Plan

Try devmatching on e.g. an if_igc device before and after :)

[emaste]

sbin/devmatch/devmatch.c

361

This one too?

[val_packett.cool]

add missed case

[val_packett.cool]

ping

[imp]

This one slipped my mind. I'll commit it today.