IB/mlx4: Generate GID change events in IBoE code

IBoE doesn't use LIDs.  Use the GID change event to update the IB core
cache for addition/deletion of GIDs.

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.co.il>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/mlx4/main.c

@@ -816,7 +816,7 @@ static void update_gids_task(struct work_struct *work)
 		memcpy(gw->dev->iboe.gid_table[gw->port - 1], gw->gids, sizeof gw->gids);
 		event.device = &gw->dev->ib_dev;
 		event.element.port_num = gw->port;
-		event.event    = IB_EVENT_LID_CHANGE;
+		event.event    = IB_EVENT_GID_CHANGE;
 		ib_dispatch_event(&event);
 	}