Always call psa_crypto_init before using TLS

In Mbed TLS 4.0, all cryptography goes through PSA, so calling
psa_crypto_init() is now mandatory before starting a TLS connection (as was
the case in Mbed TLS 3.x with MBEDTLS_USE_PSA_CRYPTO enabled).

Switch the TLS sample programs to calling psa_crypto_init() unconditionally.
Otherwise TLS 1.3 connections fail, and (D)TLS 1.2 connections soon will.

This commit omits the test programs ssl_client2 and ssl_server2, which don't
require a change right now. They will be covered when we make
MBEDTLS_USE_PSA_CRYPTO always on.

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

programs/ssl/ssl_context_info.c

@@ -925,14 +925,12 @@ int main(int argc, char *argv[])
     size_t ssl_max_len = SSL_INIT_LEN;
     size_t ssl_len = 0;
 
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
     psa_status_t status = psa_crypto_init();
     if (status != PSA_SUCCESS) {
         mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
                         (int) status);
         return MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
     }
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     /* The 'b64_file' is opened when parsing arguments to check that the
      * file name is correct */
@@ -1002,9 +1000,7 @@ int main(int argc, char *argv[])
         printf("Finished. No valid base64 code found\n");
     }
 
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
     mbedtls_psa_crypto_free();
-#endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     return 0;
 }