MFi386: use TUNABLE_ULONG_FETCH to retrieve hw.physmem.
MFi386: use TUNABLE_ULONG_FETCH to retrieve hw.physmem.

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