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/tools/setupcfg2nix/default.nix

@@ -0,0 +1,19 @@
+{ buildSetupcfg, fetchFromGitHub, lib }:
+
+buildSetupcfg rec {
+  info = import ./info.nix;
+  src = fetchFromGitHub {
+    owner = "target";
+    repo = "setupcfg2nix";
+    rev = info.version;
+    sha256 = "1rj227vxybwp9acwnpwg9np964b1qcw2av3qmx00isnrw5vcps8m";
+  };
+  application = true;
+  meta = {
+    description = "Generate nix expressions from setup.cfg for a python package";
+    homepage = "https://github.com/target/setupcfg2nix";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.all;
+    maintainers = [ lib.maintainers.shlevy ];
+  };
+}

pkgs/development/tools/setupcfg2nix/info.nix

@@ -0,0 +1,7 @@
+{
+  pname = "setupcfg2nix";
+  version = "2.0.1";
+  install_requires = [
+    "setuptools"
+  ];
+}