[SPARC64]: Fix 2 bugs in sabre_irq_build()

When installing the IRQ pre-handler, we were not setting up the second
argument correctly.  It should be a pointer to the sabre_irq_data, not
the config space PIO address.

Furthermore, we only need this pre-handler installed if the device
sits behind a PCI bridge that is not Sabre or Simba/APB.

Signed-off-by: David S. Miller <davem@davemloft.net>