Fix iq2000-elf sim, default hardware to off.

Fix iq2000-elf sim, default hardware to off.

See nearby (previous) commit for the frv sim; this similarly fails at
the dv_sockser_install declaration in sim/iq2000/tconfig.in.  There's
no HAVE_DV_SOCKSER conditionals here and no other dv-sockser.o
artefacts so maybe there is no further fallout, but I'm going to
disable sim-hardware just be consistent with the state before
94c63d78f (2013-03-23) and with the actions for the frv sim.  Make
check-sim for iq2000-elf shows no failures but that's in no small part
because it has no test-suite.

sim/iq2000:
	* configure.ac: Default simulator hardware to off again
	without emitting errors when off or dv-sockser.o unavailable.
	* configure: Regenerate.