pci, acpi: reroute PCI interrupt to legacy boot interrupt equivalent, warning fix

This patch just fixes the compiler warning:

  drivers/pci/quirks.c: In function ‘quirk_reroute_to_boot_interrupts_intel’:
  drivers/pci/quirks.c:1375: warning: unused variable ‘i’

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: sassmann@suse.de
Signed-off-by: Ingo Molnar <mingo@elte.hu>