convert bridge service to serviceDefn

modules/bridge/primary.nix

@@ -2,20 +2,11 @@
   liminix
 , lib
 }:
+{ ifname } :
 let
   inherit (liminix.networking) interface;
   inherit (liminix.lib) typeChecked;
   inherit (lib) mkOption types;
-  t = {
-    ifname = mkOption {
-      type = types.str;
-      description = "interface name for the bridge device";
-    };
-  };
-in
-params:
-let
-  inherit (typeChecked "bridge" t params) ifname;
 in interface {
   device = ifname;
   type = "bridge";