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/pyotgw/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pyserial-asyncio
+, pytest-asyncio
+, pytestCheckHook
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "pyotgw";
+  version = "unstable-2021-03-25";
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "mvn23";
+    repo = pname;
+    rev = "1854ef4ffb907524ff457ba558e4979ba7fabd02";
+    sha256 = "0zckd85dmzpz0drcgx16ly6kzh1f1slcxb9lrcf81wh1p4q9bcaa";
+  };
+
+  propagatedBuildInputs = [
+    pyserial-asyncio
+  ];
+
+  checkInputs = [
+    pytest-asyncio
+    pytestCheckHook
+  ];
+
+  pytestFlagsArray = [ "tests" ];
+
+  pythonImportsCheck = [ "pyotgw" ];
+
+  meta = with lib; {
+    description = "Python module to interact the OpenTherm Gateway";
+    homepage = "https://github.com/mvn23/pyotgw";
+    license = with licenses; [ gpl3Plus ];
+    maintainers = with maintainers; [ fab ];
+  };
+}