net/mlx5_core: don't export static symbol

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
type T;
identifier f;
@@

static T f (...) { ... }

@@
identifier r.f;
declarer name EXPORT_SYMBOL;
@@

-EXPORT_SYMBOL(f);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/main.c

@@ -697,7 +697,6 @@ err_dbg:
 	debugfs_remove(priv->dbg_root);
 	return err;
 }
-EXPORT_SYMBOL(mlx5_dev_init);
 
 static void mlx5_dev_cleanup(struct mlx5_core_dev *dev)
 {