Replace MBEDTLS_AES_C

Replace the remaining instances of MBEDTLS_AES_C
as a configuration option.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/scripts/test_config_script.py b/tests/scripts/test_config_script.py
index e500b33..b58a311 100755
--- a/tests/scripts/test_config_script.py
+++ b/tests/scripts/test_config_script.py
@@ -130,7 +130,7 @@
 ### config.py stops handling that case correctly.
 TEST_SYMBOLS = [
     'CUSTOM_SYMBOL', # does not exist
-    'MBEDTLS_AES_C', # set, no value
+    'PSA_WANT_KEY_TYPE_AES', # set, no value
     'MBEDTLS_MPI_MAX_SIZE', # unset, has a value
     'MBEDTLS_NO_UDBL_DIVISION', # unset, in "System support"
     'MBEDTLS_PLATFORM_ZEROIZE_ALT', # unset, in "Customisation configuration options"