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/os-specific/linux/i2c-tools/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, stdenv
+, fetchgit
+, perl
+, read-edid
+}:
+
+stdenv.mkDerivation rec {
+  pname = "i2c-tools";
+  version = "4.3";
+
+  src = fetchgit {
+    url = "https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git";
+    rev = "v${version}";
+    sha256 = "sha256-HlmIocum+HZEKNiS5BUwEIswRfTMUhD1vCPibAuAK0Q=";
+  };
+
+  buildInputs = [ perl ];
+
+  postPatch = ''
+    substituteInPlace eeprom/decode-edid \
+      --replace "/usr/sbin/parse-edid" "${read-edid}/bin/parse-edid"
+
+    substituteInPlace stub/i2c-stub-from-dump \
+      --replace "/sbin/" ""
+  '';
+
+  makeFlags = [ "PREFIX=${placeholder "out"}" ];
+
+  outputs = [ "out" "man" ];
+
+  postInstall = ''
+    rm -rf $out/include/linux/i2c-dev.h # conflics with kernel headers
+  '';
+
+  meta = with lib; {
+    description = "Set of I2C tools for Linux";
+    homepage = "https://i2c.wiki.kernel.org/index.php/I2C_Tools";
+    # library is LGPL 2.1 or later; "most tools" GPL 2 or later
+    license = with licenses; [ lgpl21Plus gpl2Plus ];
+    maintainers = [ maintainers.dezgeg ];
+    platforms = platforms.linux;
+  };
+}