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/misc/drivers/epson-escpr2/default.nix

@@ -0,0 +1,44 @@
+{ lib, stdenv, fetchurl, cups, busybox }:
+
+stdenv.mkDerivation rec {
+  pname = "epson-inkjet-printer-escpr2";
+  version = "1.1.46";
+
+  src = fetchurl {
+    # To find new versions, visit
+    # http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX and search for
+    # some printer like for instance "WF-7210" to get to the most recent
+    # version.
+    url = "https://download3.ebz.epson.net/dsc/f/03/00/13/43/83/99e36ae2747bfae54a5dd32dacaf189a073278aa/epson-inkjet-printer-escpr2-1.1.46-1lsb3.2.src.rpm";
+    sha256 = "sha256-7AeDULD/BB+swLBOwijilcM+yJi5slOMw2lEtquLyYw=";
+  };
+
+  unpackPhase = ''
+    runHook preUnpack
+
+    rpm2cpio $src | cpio -idmv
+    tar xvf ${pname}-${version}-1lsb3.2.tar.gz
+    cd ${pname}-${version}
+
+    runHook postUnpack
+  '';
+
+  patches = [ ./cups-filter-ppd-dirs.patch ];
+
+  buildInputs = [ cups ];
+  nativeBuildInputs = [ busybox ];
+
+  meta = with lib; {
+    homepage = "http://download.ebz.epson.net/dsc/search/01/search/";
+    description = "ESC/P-R 2 Driver (generic driver)";
+    longDescription = ''
+      Epson Inkjet Printer Driver 2 (ESC/P-R 2) for Linux and the
+      corresponding PPD files.
+
+      Refer to the description of epson-escpr for usage.
+    '';
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ ma9e ma27 ];
+    platforms = platforms.linux;
+  };
+}