x86/pci: add 4 more return parameters to IO_APIC_get_PCI_irq_vector()

To prepare those params for pcibios_irq_enable() to call setup_io_apic_routing().

[ Impact: extend function call API to prepare for new functionality ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <4A01C406.2040303@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>