Split config_psa.h: create and populate psa/crypto_adjust_auto_enabled.h

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

include/mbedtls/config_psa.h

@@ -1062,10 +1062,6 @@
 #define MBEDTLS_PSA_BUILTIN_KEY_TYPE_DH_KEY_PAIR_EXPORT 1
 #endif
 
-/* These features are always enabled. */
-#define PSA_WANT_KEY_TYPE_DERIVE 1
-#define PSA_WANT_KEY_TYPE_PASSWORD 1
-#define PSA_WANT_KEY_TYPE_PASSWORD_HASH 1
-#define PSA_WANT_KEY_TYPE_RAW_DATA 1
+#include "psa/crypto_adjust_auto_enabled.h"
 
 #endif /* MBEDTLS_CONFIG_PSA_H */

include/psa/crypto_adjust_auto_enabled.h

@@ -0,0 +1,33 @@
+/**
+ * \file psa/crypto_adjust_auto_enabled.h
+ * \brief Adjust PSA configuration: enable always-on features
+ *
+ * Always enable certain features which require a negligible amount of code
+ * to implement, to avoid some edge cases in the configuration combinatorics.
+ */
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#ifndef PSA_CRYPTO_ADJUST_AUTO_ENABLED_H
+#define PSA_CRYPTO_ADJUST_AUTO_ENABLED_H
+
+#define PSA_WANT_KEY_TYPE_DERIVE 1
+#define PSA_WANT_KEY_TYPE_PASSWORD 1
+#define PSA_WANT_KEY_TYPE_PASSWORD_HASH 1
+#define PSA_WANT_KEY_TYPE_RAW_DATA 1
+
+#endif /* PSA_CRYPTO_ADJUST_AUTO_ENABLED_H */