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>

nixos/tests/initrd-network.nix

@@ -0,0 +1,33 @@
+import ./make-test-python.nix ({ pkgs, lib, ...} : {
+  name = "initrd-network";
+
+  meta.maintainers = [ pkgs.lib.maintainers.eelco ];
+
+  nodes.machine = { ... }: {
+    imports = [ ../modules/profiles/minimal.nix ];
+    boot.initrd.network.enable = true;
+    boot.initrd.network.postCommands =
+      ''
+        ip addr show
+        ip route show
+        ip addr | grep 10.0.2.15 || exit 1
+        ping -c1 10.0.2.2 || exit 1
+      '';
+    # Check if cleanup was done correctly
+    boot.initrd.postMountCommands = lib.mkAfter
+      ''
+        ip addr show
+        ip route show
+        ip addr | grep 10.0.2.15 && exit 1
+        ping -c1 10.0.2.2 && exit 1
+      '';
+  };
+
+  testScript =
+    ''
+      start_all()
+      machine.wait_for_unit("multi-user.target")
+      machine.succeed("ip addr show >&2")
+      machine.succeed("ip route show >&2")
+    '';
+})