[SCSI] bfa: Fix to process mbox interrupts only if interrupts are enabled in INTx mode.

- Made changes to process mbox and error interrupts only if interrupts are
  enabled, when running in INTx mode.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/bfa/bfa_modules.h b/drivers/scsi/bfa/bfa_modules.h
index 2d36e48..189fff7 100644
--- a/drivers/scsi/bfa/bfa_modules.h
+++ b/drivers/scsi/bfa/bfa_modules.h
@@ -121,6 +121,7 @@
 	bfa_boolean_t		fcs;		/*  FCS is attached to BFA */
 	struct bfa_msix_s	msix;
 	int			bfa_aen_seq;
+	bfa_boolean_t		intr_enabled;	/*  Status of interrupts */
 };
 
 extern bfa_boolean_t bfa_auto_recover;