Preserve alphabetical sorting of config options

In the list that is excluded from the full config.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/scripts/config.py b/scripts/config.py
index 3035052..c53f9e7 100755
--- a/scripts/config.py
+++ b/scripts/config.py
@@ -198,6 +198,7 @@
     'MBEDTLS_NO_UDBL_DIVISION', # influences anything that uses bignum
     'MBEDTLS_PSA_P256M_DRIVER_ENABLED', # influences SECP256R1 KeyGen/ECDH/ECDSA
     'MBEDTLS_PLATFORM_NO_STD_FUNCTIONS', # removes a feature
+    'MBEDTLS_PSA_ASSUME_EXCLUSIVE_BUFFERS', # removes a feature
     'MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG', # behavior change + build dependency
     'MBEDTLS_PSA_CRYPTO_KEY_ID_ENCODES_OWNER', # incompatible with USE_PSA_CRYPTO
     'MBEDTLS_PSA_CRYPTO_SPM', # platform dependency (PSA SPM)
@@ -210,7 +211,6 @@
     'MBEDTLS_TEST_CONSTANT_FLOW_MEMSAN', # build dependency (clang+memsan)
     'MBEDTLS_TEST_CONSTANT_FLOW_VALGRIND', # build dependency (valgrind headers)
     'MBEDTLS_X509_REMOVE_INFO', # removes a feature
-    'MBEDTLS_PSA_ASSUME_EXCLUSIVE_BUFFERS', # removes a feature
 ])
 
 def is_seamless_alt(name):