Make the ISA probe actually (silently) fail if no card is found.
XXX - need to aquire the SBUS variant of this card some day or have
Jaromir find an MCA one.
and move them in their proper places.
Move the BRI registry from layer 2 (duh!) to layer 4, so active cards
(which don't have layer 3 or layer 2 in their driver). Remove all remaining
hard coded controller and driver types. Remove any arbitrary hard coded
limits, at least those that show up in the internal API.
This fixes PR 15950.