Replace (inlined) pmap_pte() calls with smaller, faster code where possible, such as the inner loop of pmap_copy().
Replace (inlined) pmap_pte() calls with smaller, faster code where
possible, such as the inner loop of pmap_copy().

Remove two comments that apply to i386 but not amd64.

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