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/libraries/libftdi/default.nix

@@ -0,0 +1,33 @@
+{lib, stdenv, fetchurl, libusb-compat-0_1}:
+
+stdenv.mkDerivation rec {
+  pname = "libftdi";
+  version = "0.20";
+
+  src = fetchurl {
+    url = "https://www.intra2net.com/en/developer/libftdi/download/${pname}-${version}.tar.gz";
+    sha256 = "13l39f6k6gff30hsgh0wa2z422g9pyl91rh8a8zz6f34k2sxaxii";
+  };
+
+  buildInputs = [ libusb-compat-0_1 ];
+
+  propagatedBuildInputs = [ libusb-compat-0_1 ];
+
+  # Hack to avoid TMPDIR in RPATHs.
+  preFixup = ''rm -rf "$(pwd)" '';
+  configureFlags = lib.optional (!stdenv.isDarwin) "--with-async-mode";
+
+  # allow async mode. from ubuntu. see:
+  #   https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/trusty/libftdi/trusty/view/head:/debian/patches/04_async_mode.diff
+  patchPhase = ''
+    substituteInPlace ./src/ftdi.c \
+      --replace "ifdef USB_CLASS_PTP" "if 0"
+  '';
+
+  meta = {
+    description = "A library to talk to FTDI chips using libusb";
+    homepage = "https://www.intra2net.com/en/developer/libftdi/";
+    license = lib.licenses.lgpl21;
+    platforms = lib.platforms.all;
+  };
+}