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/embedded/fpga/openfpgaloader/default.nix

@@ -0,0 +1,36 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, cmake
+, pkg-config
+, libftdi1
+, libusb1
+, udev
+}:
+
+stdenv.mkDerivation rec {
+  pname = "openfpgaloader";
+  version = "0.6.0";
+
+  src = fetchFromGitHub {
+    owner = "trabucayre";
+    repo = "openFPGALoader";
+    rev = "v${version}";
+    sha256 = "sha256-gPRBHy7WVra4IlGvzrhNqbEbOQtYtUC+zQ+SnJTMvRA=";
+  };
+
+  nativeBuildInputs = [ cmake pkg-config ];
+
+  buildInputs = [
+    libftdi1
+    libusb1
+    udev
+  ];
+
+  meta = with lib; {
+    description = "Universal utility for programming FPGAs";
+    homepage = "https://github.com/trabucayre/openFPGALoader";
+    license = licenses.agpl3Only;
+    maintainers = with maintainers; [ danderson ];
+  };
+}