target/arm: Use -cpu max-v8 with aarch64=off

Armv9 does not support privileged aarch32 execution, so
aarch64 cannot be disabled.  These tests must use Armv8.

Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20260827041557.775080-6-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2 files changed