pypy3Packages.home-assistant-chip-clusters: fix the eval (#355051)

pkgs/development/python-modules/home-assistant-chip-wheels/default.nix

···
           map (dep: {
             name = dep.name;
             value = dep;
-          }) list
+          }) (lib.filter (x: x != null) list)
         );
       saturateDependencies =
         deps: