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/facetimehd/default.nix

@@ -0,0 +1,44 @@
+{ stdenv, lib, fetchFromGitHub, kernel }:
+
+stdenv.mkDerivation rec {
+  name = "facetimehd-${version}-${kernel.version}";
+  version = "unstable-2020-04-16";
+
+  # Note: When updating this revision:
+  # 1. Also update pkgs/os-specific/linux/firmware/facetimehd-firmware/
+  # 2. Test the module and firmware change via:
+  #    a. Give some applications a try (Skype, Hangouts, Cheese, etc.)
+  #    b. Run: journalctl -f
+  #    c. Then close the lid
+  #    d. Then open the lid (and maybe press a key to wake it up)
+  #    e. see if the module loads back (apps using the camera won't
+  #       recover and will have to be restarted) and the camera
+  #       still works.
+  src = fetchFromGitHub {
+    owner = "patjak";
+    repo = "bcwc_pcie";
+    rev = "82626d4892eeb9eb704538bf0dc49a00725ff451";
+    sha256 = "118z6vjvhhcwvs4n3sgwwdagys9w718b8nkh6l9ic93732vv7cqx";
+  };
+
+  preConfigure = ''
+    export INSTALL_MOD_PATH="$out"
+  '';
+
+  hardeningDisable = [ "pic" ];
+
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+
+  makeFlags = [
+    "KDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/patjak/bcwc_pcie";
+    description = "Linux driver for the Facetime HD (Broadcom 1570) PCIe webcam";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ womfoo grahamc kraem ];
+    platforms = [ "i686-linux" "x86_64-linux" ];
+    broken = kernel.kernelAtLeast "5.18";
+  };
+}