Add PV chunk and list locking to pmap_change_wiring(), pmap_protect(), and pmap_remove().  The execution of these functions is no longer serialized by the pvh global lock.
Add PV chunk and list locking to pmap_change_wiring(), pmap_protect(), and
pmap_remove().  The execution of these functions is no longer serialized
by the pvh global lock.

Make some stylistic changes to the affected code for the sake of
consistency with related code elsewhere in the pmap.

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