Revert "devices.surface: remove iptsd config"

This reverts commit 959ca6c9b6.

devices/surface/default.nix

@@ -57,5 +57,10 @@ inputs:
     };
     environment.systemPackages = with inputs.pkgs; [ maliit-keyboard maliit-framework ];
     powerManagement.resumeCommands = ''${inputs.pkgs.systemd}/bin/systemctl restart iptsd'';
+    services.iptsd.config =
+    {
+      Touch = { DisableOnPalm = true; DisableOnStylus = true; Overshoot = 0.5; };
+      Contacts = { Neutral = "Average"; NeutralValue = 100; };
+    };
   };
 }