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/system76/default.nix

@@ -0,0 +1,44 @@
+{ lib, stdenv, fetchFromGitHub, kernel }:
+let
+  version = "1.0.13";
+  sha256 = "162hhmnww8z9k0795ffs8v3f61hlfm375law156sk5l08if19a4r";
+in
+stdenv.mkDerivation {
+  name = "system76-module-${version}-${kernel.version}";
+
+  passthru.moduleName = "system76";
+
+  src = fetchFromGitHub {
+    owner = "pop-os";
+    repo = "system76-dkms";
+    rev = version;
+    inherit sha256;
+  };
+
+  hardeningDisable = [ "pic" ];
+
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+
+  buildFlags = [
+    "KERNEL_DIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+  ];
+
+  installPhase = ''
+    install -D system76.ko $out/lib/modules/${kernel.modDirVersion}/misc/system76.ko
+    mkdir -p $out/lib/udev/hwdb.d
+    mv lib/udev/hwdb.d/* $out/lib/udev/hwdb.d
+  '';
+
+  meta = with lib; {
+    maintainers = [ maintainers.khumba ];
+    license = [ licenses.gpl2Plus ];
+    platforms = [ "i686-linux" "x86_64-linux" ];
+    broken = versionOlder kernel.version "4.14";
+    description = "System76 DKMS driver";
+    homepage = "https://github.com/pop-os/system76-dkms";
+    longDescription = ''
+      The System76 DKMS driver. On newer System76 laptops, this driver controls
+      some of the hotkeys and allows for custom fan control.
+    '';
+  };
+}