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>

pkgs/development/python-modules/nkdfu/default.nix

@@ -0,0 +1,31 @@
+{ lib, buildPythonPackage, fetchPypi, fire, tqdm, intelhex, libusb1 }:
+
+buildPythonPackage rec {
+  pname = "nkdfu";
+  version = "0.1";
+  format = "flit";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-Y8GonfCBi3BNMhZ99SN6/SDSa0+dbfPIMPoVzALwH5A=";
+  };
+
+  propagatedBuildInputs = [
+    fire
+    tqdm
+    intelhex
+    libusb1
+  ];
+
+  # no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "nkdfu" ];
+
+  meta = with lib; {
+    description = "Python tool for Nitrokeys' firmware update";
+    homepage = "https://github.com/Nitrokey/nkdfu";
+    license = with licenses; [ gpl2Only ];
+    maintainers = with maintainers; [ frogamic ];
+  };
+}