Eliminate a bit of hackery from vm_fault().  The operations that this hackery sought to prevent are now properly supported by vm_map_protect(). (See r198505.)
Eliminate a bit of hackery from vm_fault().  The operations that this
hackery sought to prevent are now properly supported by vm_map_protect().
(See r198505.)

Reviewed by:	kib

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