socket attach code. We now have at least a chance for pccard devices
appearing in the future.
This is a snapshot of ongoing work. Proceed at your own risk.
make development easier and push the ability of newbus to load busses
to the test.
Not added to sys/modules/Makefile because it isn't ready to break the
nightly snapshots for alpha yet :-).
NOTE: This is only for NEWCARD. The old pccard stuff will not build
as a loadable module.