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/hardware/network/intel-2200bg.nix

@@ -0,0 +1,30 @@
+{ config, pkgs, lib, ... }:
+
+{
+
+  ###### interface
+
+  options = {
+
+    networking.enableIntel2200BGFirmware = lib.mkOption {
+      default = false;
+      type = lib.types.bool;
+      description = ''
+        Turn on this option if you want firmware for the Intel
+        PRO/Wireless 2200BG to be loaded automatically.  This is
+        required if you want to use this device.
+      '';
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = lib.mkIf config.networking.enableIntel2200BGFirmware {
+
+    hardware.firmware = [ pkgs.intel2200BGFirmware ];
+
+  };
+
+}