ethernet name clash at boot

On a machine with a handful of ethernet cards things go wrong
when booting 2.5.24. Backing out the change that makes
net_dev_init() into an initcall in net/core/dev.c solves
the problem (no doubt accidentally).

More precisely, what happens is that two cards both get assigned
eth0, and then when the second one wants to register the error
-EEXIST is returned.

Thus, some more locking is required, or names must only be given
to things in the dev_base chain, or ...

Andries