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/cdemu.nix

@@ -0,0 +1,62 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let cfg = config.programs.cdemu;
+in {
+
+  options = {
+    programs.cdemu = {
+      enable = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          <command>cdemu</command> for members of
+          <option>programs.cdemu.group</option>.
+        '';
+      };
+      group = mkOption {
+        type = types.str;
+        default = "cdrom";
+        description = ''
+          Group that users must be in to use <command>cdemu</command>.
+        '';
+      };
+      gui = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether to install the <command>cdemu</command> GUI (gCDEmu).
+        '';
+      };
+      image-analyzer = mkOption {
+        type = types.bool;
+        default = true;
+        description = ''
+          Whether to install the image analyzer.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    boot = {
+      extraModulePackages = [ config.boot.kernelPackages.vhba ];
+      kernelModules = [ "vhba" ];
+    };
+
+    services = {
+      udev.extraRules = ''
+        KERNEL=="vhba_ctl", MODE="0660", OWNER="root", GROUP="${cfg.group}"
+      '';
+      dbus.packages = [ pkgs.cdemu-daemon ];
+    };
+
+    environment.systemPackages =
+      [ pkgs.cdemu-daemon pkgs.cdemu-client ]
+      ++ optional cfg.gui pkgs.gcdemu
+      ++ optional cfg.image-analyzer pkgs.image-analyzer;
+  };
+
+}