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/services/hardware/xow.nix

@@ -0,0 +1,20 @@
+{ config, pkgs, lib, ... }:
+
+let
+  cfg = config.services.hardware.xow;
+in {
+  options.services.hardware.xow = {
+    enable = lib.mkEnableOption "xow as a systemd service";
+  };
+
+  config = lib.mkIf cfg.enable {
+    hardware.uinput.enable = true;
+
+    boot.extraModprobeConfig = lib.readFile "${pkgs.xow}/lib/modprobe.d/xow-blacklist.conf";
+
+    systemd.packages = [ pkgs.xow ];
+    systemd.services.xow.wantedBy = [ "multi-user.target" ];
+
+    services.udev.packages = [ pkgs.xow ];
+  };
+}