Add guards for mbedtls_psa_crypto_free()

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/programs/ssl/mini_client.c b/programs/ssl/mini_client.c
index 6208859..27154d8 100644
--- a/programs/ssl/mini_client.c
+++ b/programs/ssl/mini_client.c
@@ -281,7 +281,9 @@
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
     mbedtls_x509_crt_free(&ca);
 #endif
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
     mbedtls_psa_crypto_free();
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
 
     mbedtls_exit(ret);
 }