IB/mlx5: Remove dead code from alloc_cached_mr()

The only place that assigns mr inside the loop already does a break.
So "if (mr)" will never be true here since the function initializes mr
to NULL at the top.  We can just drop the extra if and break here.
Signed-off-by: NRoland Dreier <roland@purestorage.com>
Acked-by: NEli Cohen  <eli@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/mr.c

@@ -441,9 +441,6 @@ static struct mlx5_ib_mr *alloc_cached_mr(struct mlx5_ib_dev *dev, int order)
 		spin_unlock_irq(&ent->lock);
 
 		queue_work(cache->wq, &ent->work);
-
-		if (mr)
-			break;
 	}
 
 	if (!mr)