bnx2fc: Add driver tunables.

Per customer request, add the following driver tunables:

o devloss_tmo
o max_luns
o queue_depth
o tm_timeout

tm_timeout is set per scsi_host in /sys/class/scsi_host/hostX/tm_timeout.

Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/bnx2fc/bnx2fc.h b/drivers/scsi/bnx2fc/bnx2fc.h
index 499e369..106788f 100644
--- a/drivers/scsi/bnx2fc/bnx2fc.h
+++ b/drivers/scsi/bnx2fc/bnx2fc.h
@@ -261,6 +261,7 @@
 	u8 vlan_enabled;
 	int vlan_id;
 	bool enabled;
+	u8 tm_timeout;
 };
 
 #define bnx2fc_from_ctlr(x)			\