Devfs tries to be super smart and rereads partition tables at all
kinds of wierd points.  This breaks a bunch of stuff were you
can't get the right disk changed information (i.e. CompactFlash).

If people actually need this kind of stuff they should just call partx
from devfsd instead of relying on the kernel doing something like this.

Cleans up the devfs code significatnly (aka removes tons of junk)