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/scripts/footprint.sh b/scripts/footprint.sh
index e45a926..e7078cf 100755
--- a/scripts/footprint.sh
+++ b/scripts/footprint.sh
@@ -64,7 +64,8 @@
         scripts/config.py unset MBEDTLS_NET_C || true
         scripts/config.py unset MBEDTLS_TIMING_C || true
         scripts/config.py unset MBEDTLS_FS_IO || true
-        scripts/config.py --force set MBEDTLS_PLATFORM_GET_ENTROPY_ALT || true
+        scripts/config.py unset MBEDTLS_PSA_BUILTIN_GET_ENTROPY || true
+        scripts/config.py --force set MBEDTLS_PSA_DRIVER_GET_ENTROPY || true
     } >/dev/null 2>&1
 
     make clean >/dev/null