Back when we introduced MBEDTLS_PSA_CRYPTO_CONFIG and it was still
experimental, it made sense that we tested it separately. Nowadays, the
feature is fully implemented, and the full config without
MBEDTLS_PSA_CRYPTO_CONFIG keeps cryptographic mechanisms that only have a
PSA implementation and aren't in the default build disabled (currently:
PBKDF2). So enable MBEDTLS_PSA_CRYPTO_CONFIG in the full config.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
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