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/migen/default.nix

@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchFromGitHub
+, colorama
+}:
+
+buildPythonPackage rec {
+  pname = "migen";
+  version = "unstable-2021-09-14";
+  disabled = pythonOlder "3.3";
+
+  src = fetchFromGitHub {
+    owner = "m-labs";
+    repo = "migen";
+    rev = "a5bc262560238f93ceaad423820eb06843326274";
+    sha256 = "32UjaIam/B7Gx6XbPcR067LcXfokJH2mATG9mU38a6o=";
+  };
+
+  propagatedBuildInputs = [
+    colorama
+  ];
+
+  pythonImportsCheck = [ "migen" ];
+
+  meta = with lib; {
+    description = " A Python toolbox for building complex digital hardware";
+    homepage = "https://m-labs.hk/migen";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ l-as ];
+  };
+}