Don't try to setup interrupts for drivers that don't support them.
Don't try to setup interrupts for drivers that don't support them.

This causes sis and probably a couple of other driver to panic and fail.

Tested by:	cpghost <cpghost@cordula.ws>
PR:		133554
MFC after:	3 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase