Sufficient access checks are performed by vmapbuf() that calling useracc() is pointless.  Remove the call to useracc() from physio().
Sufficient access checks are performed by vmapbuf() that calling
useracc() is pointless.  Remove the call to useracc() from physio().

Reviewed by:	tegge

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