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/flashrom.nix

@@ -0,0 +1,26 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.flashrom;
+in
+{
+  options.programs.flashrom = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Installs flashrom and configures udev rules for programmers
+        used by flashrom. Grants access to users in the "flashrom"
+        group.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.udev.packages = [ pkgs.flashrom ];
+    environment.systemPackages = [ pkgs.flashrom ];
+    users.groups.flashrom = { };
+  };
+}