IB/qib: Update QIB to use the latest PCI API

The QIB PCI IRQ code uses an obsolete PCI API.  Updating the code to use
the new PCI IRQ API and any necessary changes because of the new API.

Reviewed-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/qib/qib_7220.h

@@ -67,7 +67,6 @@ struct qib_chip_specific {
 	u32 lastbuf_for_pio;
 	u32 updthresh; /* current AvailUpdThld */
 	u32 updthresh_dflt; /* default AvailUpdThld */
-	int irq;
 	u8 presets_needed;
 	u8 relock_timer_active;
 	char emsgbuf[128];