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/development/embedded/fpga/ecpdap/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchFromGitHub, rustPlatform, pkg-config, libusb1, AppKit }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "ecpdap";
+  version = "0.1.7";
+
+  src = fetchFromGitHub {
+    owner = "adamgreig";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-fdvpGmEy54i48H6YJ4E1LIuogimNEL8PJS5ScoW/6DM=";
+  };
+
+  cargoSha256 = "sha256-2YARNoHVDBwGr8FE/oRlNZMX/vCPIre7OnZbr04eF/M=";
+
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ libusb1 ]
+    ++ lib.optional stdenv.isDarwin AppKit;
+
+  postInstall = ''
+    mkdir -p $out/etc/udev/rules.d
+    cp drivers/*.rules $out/etc/udev/rules.d
+  '';
+
+  meta = with lib; {
+    description = "A tool to program ECP5 FPGAs";
+    longDescription = ''
+      ECPDAP allows you to program ECP5 FPGAs and attached SPI flash
+      using CMSIS-DAP probes in JTAG mode.
+    '';
+    homepage = "https://github.com/adamgreig/ecpdap";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ expipiplus1 ];
+  };
+}
+