mlxsw: spectrum: Add a temporary variable to indicate bridge model

As part of transition to unified bridge model, many different firmware
configurations are done.

Some of the configuration that needs to be done for the unified bridge
model is not valid under the legacy model, and would be rejected by the
firmware. At the same time, the driver cannot switch to the unified bridge
model until all of the code has been converted.

To allow breaking the change into patches, and to not break driver
behavior during the transition, add a boolean variable to indicate bridge
model. Then, forbidden configurations will be skipped using the check -
"if (!mlxsw_sp->ubridge)".

The new variable is temporary for several sets, it will be removed when
firmware will be configured to work with unified bridge model.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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

@@ -3155,6 +3155,7 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
 		goto err_ports_create;
 	}
 
+	mlxsw_sp->ubridge = false;
 	return 0;
 
 err_ports_create:

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

@@ -216,6 +216,7 @@ struct mlxsw_sp {
 	u32 lowest_shaper_bs;
 	struct rhashtable ipv6_addr_ht;
 	struct mutex ipv6_addr_ht_lock; /* Protects ipv6_addr_ht */
+	bool ubridge;
 };
 
 struct mlxsw_sp_ptp_ops {