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>

flake.nix

@@ -0,0 +1,47 @@
+# Experimental flake interface to Nixpkgs.
+# See https://github.com/NixOS/rfcs/pull/49 for details.
+{
+  description = "A collection of packages for the Nix package manager";
+
+  outputs = { self }:
+    let
+      jobs = import ./pkgs/top-level/release.nix {
+        nixpkgs = self;
+      };
+
+      lib = import ./lib;
+
+      forAllSystems = f: lib.genAttrs lib.systems.flakeExposed (system: f system);
+
+    in
+    {
+      lib = lib.extend (final: prev: {
+
+        nixos = import ./nixos/lib { lib = final; };
+
+        nixosSystem = args:
+          import ./nixos/lib/eval-config.nix (args // {
+            modules = args.modules ++ [ {
+              system.nixos.versionSuffix =
+                ".${final.substring 0 8 (self.lastModifiedDate or self.lastModified or "19700101")}.${self.shortRev or "dirty"}";
+              system.nixos.revision = final.mkIf (self ? rev) self.rev;
+            } ];
+          });
+      });
+
+      checks.x86_64-linux.tarball = jobs.tarball;
+
+      htmlDocs = {
+        nixpkgsManual = jobs.manual;
+        nixosManual = (import ./nixos/release-small.nix {
+          nixpkgs = self;
+        }).nixos.manual.x86_64-linux;
+      };
+
+      legacyPackages = forAllSystems (system: import ./. { inherit system; });
+
+      nixosModules = {
+        notDetected = import ./nixos/modules/installer/scan/not-detected.nix;
+      };
+    };
+}