tests/functional: Allow microblaze tests to take a machine name argument

Make microblaze tests a bit more generic.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20250206131052.30207-14-philmd@linaro.org>
2 files changed