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/kernel/linux-testing-bcachefs.nix

@@ -0,0 +1,34 @@
+{ lib
+, fetchpatch
+, kernel
+, date ? "2022-04-25"
+, commit ? "bdf6d7c1350497bc7b0be6027a51d9330645672d"
+, diffHash ? "09bcbklvfj9i9czjdpix2iz7fvjksmavaljx8l92ay1i9fapjmhc"
+, kernelPatches # must always be defined in bcachefs' all-packages.nix entry because it's also a top-level attribute supplied by callPackage
+, argsOverride ? {}
+, ...
+} @ args:
+
+# NOTE: bcachefs-tools should be updated simultaneously to preserve compatibility
+(kernel.override ( args // {
+  argsOverride = {
+    version = "${kernel.version}-bcachefs-unstable-${date}";
+
+    extraMeta = {
+      branch = "master";
+      maintainers = with lib.maintainers; [ davidak Madouura ];
+    };
+  } // argsOverride;
+
+  kernelPatches = [ {
+      name = "bcachefs-${commit}";
+
+      patch = fetchpatch {
+        name = "bcachefs-${commit}.diff";
+        url = "https://evilpiepirate.org/git/bcachefs.git/rawdiff/?id=${commit}&id2=v${lib.versions.majorMinor kernel.version}";
+        sha256 = diffHash;
+      };
+
+      extraConfig = "BCACHEFS_FS m";
+    } ] ++ kernelPatches;
+}))