psa_crypto_helpers: add MBEDTLS_TEST_ prefix to newly created symbols

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/include/test/psa_crypto_helpers.h b/tests/include/test/psa_crypto_helpers.h
index 30b696d..0becb4c 100644
--- a/tests/include/test/psa_crypto_helpers.h
+++ b/tests/include/test/psa_crypto_helpers.h
@@ -473,14 +473,15 @@
  * used in test cases where MBEDTLS_PSA_STATIC_KEY_SLOTS is enabled. */
 #if defined(MBEDTLS_PSA_CRYPTO_C)
 #if (MBEDTLS_PSA_STATIC_KEY_SLOT_BUFFER_SIZE >= PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(4096))
-#define STATIC_KEY_SLOTS_SUPPORT_RSA_4096
+#define MBEDTLS_TEST_STATIC_KEY_SLOTS_SUPPORT_RSA_4096
 #endif
 
 #if (MBEDTLS_PSA_STATIC_KEY_SLOT_BUFFER_SIZE >= PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(2048))
-#define STATIC_KEY_SLOTS_SUPPORT_RSA_2048
+#define MBEDTLS_TEST_STATIC_KEY_SLOTS_SUPPORT_RSA_2048
 #endif
 
-#if !defined(MBEDTLS_PSA_STATIC_KEY_SLOTS) || defined(STATIC_KEY_SLOTS_SUPPORT_RSA_4096)
+#if !defined(MBEDTLS_PSA_STATIC_KEY_SLOTS) || \
+    defined(MBEDTLS_TEST_STATIC_KEY_SLOTS_SUPPORT_RSA_4096)
 #define MBEDTLS_TEST_ALLOW_RSA_4096
 #endif