Apply the same fix as in r215823 to sys/amd64/amd64/fpu.c: use unambiguous inline assembly to load a float variable.
Apply the same fix as in r215823 to sys/amd64/amd64/fpu.c: use
unambiguous inline assembly to load a float variable.

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