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/uhk-udev-rules/default.nix

@@ -0,0 +1,20 @@
+{ lib, stdenv, uhk-agent }:
+
+stdenv.mkDerivation {
+  pname = "uhk-udev-rules";
+  inherit (uhk-agent) version;
+
+  dontUnpack = true;
+  dontBuild = true;
+  installPhase = ''
+    runHook preInstall
+    install -D -m 644 ${uhk-agent.out}/rules/50-uhk60.rules $out/lib/udev/rules.d/50-uhk60.rules
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "udev rules for UHK keyboards from https://ultimatehackingkeyboard.com";
+    inherit (uhk-agent.meta) license;
+    maintainers = [ lib.maintainers.ngiger ];
+  };
+}