Bluetooth: Mesh: Fix subnet bridge table status type

Changes status type to be status codes defined in Mesh Protocol 4.3.14
as defined for the `BRIDGING_TABLE_STATUS` message.

Signed-off-by: Håvard Reierstad <haavard.reierstad@nordicsemi.no>

include/zephyr/bluetooth/mesh/brg_cfg.h

@@ -45,7 +45,7 @@ struct bridging_table_entry {
 /** Bridging Table Status response */
 struct bt_mesh_bridging_table_status {
 	/** Status Code of the requesting message */
-	enum bt_mesh_subnet_bridge_state status;
+	uint8_t status;
 	/** Requested Bridging Table entry */
 	struct bridging_table_entry entry;
 };