[SCSI] qla2xxx: Add loopback IDC-TIME-EXTEND aen handling support.

Earlier IDC-TIME-EXTEND aen was a nop and ignored by driver.
We now have to handle the aen so that other protocol drivers can use time
extension during some loopback operations.

Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index d6eefb8..93db74e 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3292,6 +3292,7 @@
 
 	/* QLA83XX IDC specific fields */
 	uint32_t	idc_audit_ts;
+	uint32_t	idc_extend_tmo;
 
 	/* DPC low-priority workqueue */
 	struct workqueue_struct *dpc_lp_wq;