[IA64-SGI]: disable non-display ROM resources

[IA64-SGI]: disable non-display ROM resources

This patch is needed to correctly support the new sysfs rom file.  On sn2, we
only allocate PIO space for display option ROMs since PIO space is a
relatively scarce resource (we've seen exhaustion when running with several
qla cards in the same domain).  And without this patch we won't zero out
non-display ROM resources which can lead to panics if anyone tries to use the
bogus addresses left over there from the generic PCI probing code.

Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>