[PATCH] sn2: 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.  

Thanks,
Jesse

Signed-off-by: Jesse Barnes <jbarnes@sgi.com>

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