pianonix: small fixes to make it compile

hosts/pianonix/default.nix

@@ -88,9 +88,6 @@
       enable = true;
       overrideSettings = true;
     };
-    pianoLEDVisualizer = {
-      enable = true;
-    };
   };
 
   # Enable the Desktop Environment.
@@ -204,11 +201,11 @@
   hardware.raspberry-pi."4".apply-overlays-dtmerge.enable = true;
   hardware.deviceTree = {
     enable = true;
-    filter = "*-rpi-*.dtb";
+    filter = lib.mkForce "*-rpi-*.dtb";
     overlays = [
       {
         name = "spi";
-        dtsoFile = ./spi0-0cd.dtso;
+        dtboFile = ./spi0-0cs.dtbo;
       }
     ];
   };
@@ -234,4 +231,7 @@
 
   # Add user to group
   users.users.julian.extraGroups = ["gpio"];
+
+  ## My own Piano LED Visualizer
+  services.piano-led-visualizer.enable = true;
 }