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/ryzenadj/default.nix

@@ -0,0 +1,27 @@
+{ lib, stdenv, fetchFromGitHub, pciutils, cmake }:
+stdenv.mkDerivation rec {
+  pname = "ryzenadj";
+  version = "0.9.0";
+
+  src = fetchFromGitHub {
+    owner = "FlyGoat";
+    repo = "RyzenAdj";
+    rev = "v${version}";
+    sha256 = "sha256-RoKRqqIVY9zjyXzGxHo+J4OV7cKc7CkqsdbpreB7EHc=";
+  };
+
+  nativeBuildInputs = [ pciutils cmake ];
+
+  installPhase = ''
+    install -D libryzenadj.so $out/lib/libryzenadj.so
+    install -D ryzenadj $out/bin/ryzenadj
+  '';
+
+  meta = with lib; {
+    description = "Adjust power management settings for Ryzen Mobile Processors.";
+    homepage = "https://github.com/FlyGoat/RyzenAdj";
+    license = licenses.lgpl3Only;
+    maintainers = with maintainers; [ asbachb ];
+    platforms = [ "x86_64-linux" ];
+  };
+}