edl: mark as unfree

See #348931.

According to upstream, the loader blobs shipped with EDL are usually
illicitly obtained from vendors and sold [0].

[0]: https://github.com/bkerler/Loaders

(cherry picked from commit 978f4e4)

pkgs/development/embedded/edl/default.nix

@@ -36,7 +36,8 @@ python3Packages.buildPythonPackage rec {
   meta = with lib; {
     homepage = "https://github.com/bkerler/edl";
     description = "Qualcomm EDL tool (Sahara / Firehose / Diag)";
-    license = licenses.mit;
+    # See https://github.com/NixOS/nixpkgs/issues/348931
+    license = licenses.unfree;
     maintainers = with maintainers; [ lorenz ];
     # Case-sensitive files in 'Loader' submodule
     broken = stdenv.isDarwin;