uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

nixos/modules/programs/calls.nix

@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.calls;
+in {
+  options = {
+    programs.calls = {
+      enable = mkEnableOption ''
+        Whether to enable GNOME calls: a phone dialer and call handler.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    programs.dconf.enable = true;
+
+    environment.systemPackages = [
+      pkgs.calls
+    ];
+
+    services.dbus.packages = [
+      pkgs.callaudiod
+    ];
+  };
+}