The alias needs to be part of the provider instead of the geom. To bind the DEV
geom, we need to look at the provider's names and aliases and create the dev
entries from there. If this lives in the GEOM, then it won't propigate down the
tree properly. Remove it from geom, add it provider.
Update geli, gmountver, gnop, gpart, and guzip to use it, which handles the bulk
of the uses in FreeBSD. I think this is all the providers that apply a suffix to
the parent name.
Add nvd alias back to nda now that it actually works.