Turn PUC_FASTINTR back off on by default on sparc64 since it breaks with the built-in serial ports on the ultra60 and e4500.
Turn PUC_FASTINTR back off on by default on sparc64 since it breaks with
the built-in serial ports on the ultra60 and e4500.

In collusion with:	kris

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