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/top-level/packages-config.nix

@@ -0,0 +1,52 @@
+# Used in the generation of package search database.
+{
+  # Ensures no aliases are in the results.
+  allowAliases = false;
+
+  # Enable recursion into attribute sets that nix-env normally doesn't look into
+  # so that we can get a more complete picture of the available packages for the
+  # purposes of the index.
+  packageOverrides = super: with super; lib.mapAttrs (_: set: recurseIntoAttrs set) {
+    inherit (super)
+      apacheHttpdPackages
+      atomPackages
+      fdbPackages
+      fusePackages
+      gns3Packages
+      idrisPackages
+      nodePackages
+      nodePackages_latest
+      platformioPackages
+      quicklispPackagesClisp
+      quicklispPackagesSBCL
+      rPackages
+      roundcubePlugins
+      sconsPackages
+      sourceHanPackages
+      steamPackages
+      ut2004Packages
+      zabbix40
+      zabbix50
+      zeroadPackages
+    ;
+
+    haskellPackages = super.haskellPackages // {
+      # mesos, which this depends on, has been removed from nixpkgs. We are keeping
+      # the error message for now, so users will get an error message they can make
+      # sense of, but need to work around it here.
+      # TODO(@sternenseemann): remove this after branch-off of 22.05, along with the
+      # override in configuration-nix.nix
+      hs-mesos = null;
+    };
+
+    # Make sure haskell.compiler is included, so alternative GHC versions show up,
+    # but don't add haskell.packages.* since they contain the same packages (at
+    # least by name) as haskellPackages.
+    haskell = super.haskell // {
+      compiler = recurseIntoAttrs super.haskell.compiler;
+    };
+
+    # This is an alias which we disallow by default; explicitly allow it
+    emacs28Packages = emacs28.pkgs;
+  };
+}