Rename AEAD macro to not use double underscores

This pattern (identifiers containing a double underscore anywhere in them)
is reserved.

Author: AndrzejKurek

include/psa/crypto_values.h

@@ -1015,15 +1015,15 @@
  * \return              The corresponding AEAD algorithm with the default
  *                      tag length for that algorithm.
  */
-#define PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH(aead_alg)                  \
-    (                                                                   \
-        PSA__ALG_AEAD_WITH_DEFAULT_TAG_LENGTH__CASE(aead_alg, PSA_ALG_CCM) \
-        PSA__ALG_AEAD_WITH_DEFAULT_TAG_LENGTH__CASE(aead_alg, PSA_ALG_GCM) \
-        PSA__ALG_AEAD_WITH_DEFAULT_TAG_LENGTH__CASE(aead_alg, PSA_ALG_CHACHA20_POLY1305) \
+#define PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH(aead_alg)                   \
+    (                                                                    \
+        PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH_CASE(aead_alg, PSA_ALG_CCM) \
+        PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH_CASE(aead_alg, PSA_ALG_GCM) \
+        PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH_CASE(aead_alg, PSA_ALG_CHACHA20_POLY1305) \
         0)
-#define PSA__ALG_AEAD_WITH_DEFAULT_TAG_LENGTH__CASE(aead_alg, ref)      \
-    PSA_ALG_AEAD_WITH_TAG_LENGTH(aead_alg, 0) ==                        \
-    PSA_ALG_AEAD_WITH_TAG_LENGTH(ref, 0) ?  \
+#define PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH_CASE(aead_alg, ref)         \
+    PSA_ALG_AEAD_WITH_TAG_LENGTH(aead_alg, 0) ==                         \
+    PSA_ALG_AEAD_WITH_TAG_LENGTH(ref, 0) ?                               \
     ref :
 
 #define PSA_ALG_RSA_PKCS1V15_SIGN_BASE          ((psa_algorithm_t)0x10020000)

tests/scripts/test_psa_constant_names.py

@@ -162,6 +162,7 @@ def _argument_split(cls, arguments):
     # PSA_ALG_ECDH and PSA_ALG_FFDH are excluded for now as the script
     # currently doesn't support them. Deprecated errors are also excluded.
     _excluded_names = set(['PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH',
+                           'PSA_ALG_AEAD_WITH_DEFAULT_TAG_LENGTH_CASE',
                            'PSA_ALG_FULL_LENGTH_MAC',
                            'PSA_ALG_ECDH',
                            'PSA_ALG_FFDH',