Fix the powerpc64 build.  MACHINE_CPUARCH is common for powerpc/powerpc64, not MACHINE_ARCH.
Fix the powerpc64 build.  MACHINE_CPUARCH is common for powerpc/powerpc64,
not MACHINE_ARCH.

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