bmips: bcm6358: revert use wan ports as standalone ports

This reverts commit 15430a1348 for bcm6358 subtarget since it breaks
network configuration.

Signed-off-by: Álvaro Fernández Rojas <[email protected]>

target/linux/bmips/bcm6358/base-files/etc/board.d/02_network

@@ -6,6 +6,7 @@ board_config_update
 
 case "$(board_name)" in
 huawei,hg556a-b)
+	ucidef_set_bridge_device switch
 	ucidef_set_interface_lan "lan1 lan2 lan3 lan4"
 	;;
 esac