Introduce pmap_enter_locked() and use it to reimplement pmap_enter_quick().
Introduce pmap_enter_locked() and use it to reimplement pmap_enter_quick().

Tested by: cognet@

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