IB/mlx4: Fix up SRQ limit_watermark endianness

mlx4_srq_query() returns a big-endian 16-bit value through an int *,
which screws up sparse checking.  Fix this so that a CPU-endian value
is returned.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index 408748f..e7e9a3d 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -251,7 +251,7 @@
 	if (ret)
 		return ret;
 
-	srq_attr->srq_limit = be16_to_cpu(limit_watermark);
+	srq_attr->srq_limit = limit_watermark;
 	srq_attr->max_wr    = srq->msrq.max - 1;
 	srq_attr->max_sge   = srq->msrq.max_gs;