RDMA/mlx5: Separate restrack callbacks initialization from main.c

The restrack code has separate .c, so move callbacks initialization to
that file to improve code locality.

Link: https://lore.kernel.org/r/20200702081809.423482-3-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/mlx5/restrack.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/*
+ * Copyright (c) 2013-2020, Mellanox Technologies Ltd. All rights reserved.
+ */
+
+#ifndef _MLX5_IB_RESTRACK_H
+#define _MLX5_IB_RESTRACK_H
+
+#include "mlx5_ib.h"
+
+int mlx5_ib_restrack_init(struct mlx5_ib_dev *dev);
+
+#endif /* _MLX5_IB_RESTRACK_H */