Add firmware-manager and keyboard-configurator for garrus

hosts/x86_64/galp4.nix

@@ -1,9 +0,0 @@
-{ config, pkgs, ... }: 
-
-{
-    # Name your host machine
-    networking.hostName = "galp4"; 
-
-    # System76
-    hardware.system76.enableAll = true;
-}

hosts/x86_64/garrus/configuration.nix

@@ -8,6 +8,14 @@
     hardware.system76.enableAll = true;
     environment.systemPackages = with pkgs; [
         system76-keyboard-configurator
+        firmware-manager
     ];
 
+    # NVIDIA
+#    services.xserver.videoDrivers = [ "nvidia" ];   
+#    hardware.opengl.enable = true;
+#    hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.stable;
+
+    # Allow Unfree
+    nixpkgs.config.allowUnfree = true;
 }