tests/functional/test_aarch64_rme: update image

tests/functional/test_aarch64_rme: update image

TF-A needs to be patched to enable support for FEAT_TCR2 and
FEAT_SCTLR2. This new image contains updated firmware.

Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250727074202.83141-3-richard.henderson@linaro.org
Message-ID: <20250719035838.2284029-3-pierrick.bouvier@linaro.org>
[PMM: switch to os.makedirs(..., exist_ok=True) to improve
 robustness when re-run after test was cancelled midway]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>