tests/functional: Move rx test into target-specific folders

Move the architecture specific test into an architecture specific
subdirectory.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250819112403.432587-19-thuth@redhat.com>
4 files changed