mlxsw: spectrum_acl: Extend Spectrum-2 region struct

In a similar fashion to Spectrum-1's region struct, Spectrum-2's struct
needs to store a pointer to the common region struct.

The pointer will be used in follow-up patches that implement rules
insertion and deletion.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum2_acl_tcam.c

@@ -45,6 +45,7 @@ struct mlxsw_sp2_acl_tcam {
 
 struct mlxsw_sp2_acl_tcam_region {
 	struct mlxsw_sp_acl_ctcam_region cregion;
+	struct mlxsw_sp_acl_tcam_region *region;
 };
 
 struct mlxsw_sp2_acl_tcam_chunk {
@@ -127,6 +128,8 @@ mlxsw_sp2_acl_tcam_region_init(struct mlxsw_sp *mlxsw_sp, void *region_priv,
 	struct mlxsw_sp2_acl_tcam_region *region = region_priv;
 	int err;
 
+	region->region = _region;
+
 	err = mlxsw_sp_acl_atcam_region_init(mlxsw_sp, _region);
 	if (err)
 		return err;