Flag isp(4) as supporting unmapped I/O; all necessary conversion actually already has been done as part of r246713.
Flag isp(4) as supporting unmapped I/O; all necessary conversion actually
already has been done as part of r246713.

Reviewed by:	mjacob

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