Revert "yosys: mark as broken on darwin"

This reverts commit ad60ae83a2f2ec0ef5a19db6ca8d6b08089c8b14.

pkgs/development/compilers/yosys/default.nix

···
     homepage = "https://yosyshq.net/yosys/";
     license = licenses.isc;
     platforms = platforms.all;
-    badPlatforms = [
-      # Tests fail
-      # https://github.com/NixOS/nixpkgs/issues/398121
-      lib.systems.inspect.patterns.isDarwin
-    ];
     maintainers = with maintainers; [
       shell
       thoughtpolice