Prepare for the removal of MBEDTLS_PLATFORM_GET_ENTROPY_ALT

We cannot remove it completely yet.
It must remain in config.py so that it is not
included in the full configuration.
A temporary exception is required for it in
analyze_outcomes.py.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index d1bb553..a6f03a8 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -128,6 +128,8 @@
             # PSA entropy drivers.
             # https://github.com/Mbed-TLS/mbedtls/issues/8150
             'Config: MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES',
+            # Obsolete config option that we are about to remove
+            'Config: MBEDTLS_PLATFORM_GET_ENTROPY_ALT',
             # Untested aspect of the platform interface.
             # https://github.com/Mbed-TLS/mbedtls/issues/9589
             'Config: MBEDTLS_PLATFORM_NO_STD_FUNCTIONS',