`IO.console` is missing with JRuby on Linux aarch64

I am testing this on a Linux aarch64 with JRuby. I can see the `io/console/ffi/stty_console` is being loaded based on the warning message: ["io/console on JRuby shells out to stty for most operations"](https://github.com/ruby/io-console/blob/8eabe3286d08d3ad24f773b6aa0f057278d9c079/lib/io/console/ffi/stty_console.rb#L7) If I manually require `io/console/ffi/native_console` it fails due to the [platform guard at the top of the file](https://github.com/ruby/io-console/blob/8eabe3286d08d3ad24f773b6aa0f057278d9c079/lib/io/console/ffi/linux_console.rb#L3). However, if I remove that guard it, it loads and works fine in my brief testing. So I have two questions: 1. Is there any reason to not allow `aarch64` in the `io/console/ffi/linux_console` guard? 2. Even if it falls back to `io/console/ffi/stty_console`, is there any reason not to support `IO.console`? I think it could return `File.new("/dev/tty/", "r+")` similar to the one in `io/console/ffi/native_console`?