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/oyaml/default.nix

@@ -0,0 +1,43 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+
+  # pythonPackages
+, pytestCheckHook
+, pythonOlder
+, pyyaml
+}:
+
+buildPythonPackage rec {
+  pname = "oyaml";
+  version = "unstable-2021-12-03";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchFromGitHub {
+    owner = "wimglenn";
+    repo = "oyaml";
+    rev = "d0195070d26bd982f1e4e604bded5510dd035cd7";
+    hash = "sha256-1rSEhiULlAweLDqUFX+JBFxe3iW9kNlRA2zjcG8MYSg=";
+  };
+
+  propagatedBuildInputs = [
+    pyyaml
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "oyaml"
+  ];
+
+  meta = with lib; {
+    description = "Drop-in replacement for PyYAML which preserves dict ordering";
+    homepage = "https://github.com/wimglenn/oyaml";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kamadorueda ];
+  };
+}