[SCSI] bfa: Added support to configure QOS and collect stats.

- Added support to configure QOS on Brocade adapter ports.
- Added support to collect / reset QOS statistics.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/bfa/bfa_defs_svc.h b/drivers/scsi/bfa/bfa_defs_svc.h
index 21e3fbf..263438b 100644
--- a/drivers/scsi/bfa/bfa_defs_svc.h
+++ b/drivers/scsi/bfa/bfa_defs_svc.h
@@ -469,6 +469,7 @@
  * QoS states
  */
 enum bfa_qos_state {
+	BFA_QOS_DISABLED = 0,		/* QoS is disabled */
 	BFA_QOS_ONLINE = 1,		/*  QoS is online */
 	BFA_QOS_OFFLINE = 2,		/*  QoS is offline */
 };