mlxsw: spectrum_router: Privatize mlxsw_sp_rif_dev()

Now that the external users of mlxsw_sp_rif_dev() have been converted in
the preceding patches, make the function static.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -8075,7 +8075,7 @@ int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif)
 	return rif->dev->ifindex;
 }
 
-const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif)
+static const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif)
 {
 	return rif->dev;
 }

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h

@@ -93,7 +93,6 @@ u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *rif);
 u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif);
 u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev);
 int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif);
-const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif);
 bool mlxsw_sp_rif_has_dev(const struct mlxsw_sp_rif *rif);
 bool mlxsw_sp_rif_dev_is(const struct mlxsw_sp_rif *rif,
 			 const struct net_device *dev);