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/firmware/raspberrypi/armstubs.nix

@@ -0,0 +1,53 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+let
+  inherit (lib) optionals;
+in
+stdenv.mkDerivation {
+  pname = "raspberrypi-armstubs";
+  version = "2021-11-01";
+
+  src = fetchFromGitHub {
+    owner = "raspberrypi";
+    repo = "tools";
+    rev = "13474ee775d0c5ec8a7da4fb0a9fa84187abfc87";
+    sha256 = "s/RPMIpQSznoQfchAP9gpO7I2uuTsOV0Ep4vVz7i2o4=";
+  };
+
+  NIX_CFLAGS_COMPILE = [
+    "-march=armv8-a+crc"
+  ];
+
+  preConfigure = ''
+    cd armstubs
+  '';
+
+  makeFlags = [
+    "CC8=${stdenv.cc.targetPrefix}cc"
+    "LD8=${stdenv.cc.targetPrefix}ld"
+    "OBJCOPY8=${stdenv.cc.targetPrefix}objcopy"
+    "OBJDUMP8=${stdenv.cc.targetPrefix}objdump"
+    "CC7=${stdenv.cc.targetPrefix}cc"
+    "LD7=${stdenv.cc.targetPrefix}ld"
+    "OBJCOPY7=${stdenv.cc.targetPrefix}objcopy"
+    "OBJDUMP7=${stdenv.cc.targetPrefix}objdump"
+  ]
+  ++ optionals (stdenv.isAarch64) [ "armstub8.bin" "armstub8-gic.bin" ]
+  ++ optionals (stdenv.isAarch32) [ "armstub7.bin" "armstub8-32.bin" "armstub8-32-gic.bin" ]
+  ;
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -vp $out/
+    cp -v *.bin $out/
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Firmware related ARM stubs for the Raspberry Pi";
+    homepage = "https://github.com/raspberrypi/tools";
+    license = licenses.bsd3;
+    platforms = [ "armv6l-linux" "armv7l-linux" "aarch64-linux" ];
+    maintainers = with maintainers; [ samueldr ];
+  };
+}