PCI: Remove the irq_affinity mask from struct pci_dev

This has never been used, and now is totally unreferenced. Nuke it.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Reviewed-by: Johannes Thumshirn <[e-mail]>
Acked-by: Bjorn Helgaas <[e-mail]>
Acked-by: Jens Axboe <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Thomas Gleixner <[e-mail]>

include/linux/pci.h

···
 	 * directly, use the values stored here. They might be different!
 	 */
 	unsigned int	irq;
-	struct cpumask	*irq_affinity;
 	struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */
 
 	bool match_driver;		/* Skip attaching driver */