Replace MBEDTLS_SSL_HAVE_GCM with PSA_WANT_ALG_GCM

Signed-off-by: Elena Uziunaite <elena.uziunaite@arm.com>
diff --git a/tests/include/test/ssl_helpers.h b/tests/include/test/ssl_helpers.h
index ec4ab64..d6a4c1e 100644
--- a/tests/include/test/ssl_helpers.h
+++ b/tests/include/test/ssl_helpers.h
@@ -39,14 +39,14 @@
 
 #if defined(MBEDTLS_SSL_PROTO_TLS1_3)
 #if defined(PSA_WANT_KEY_TYPE_AES)
-#if defined(MBEDTLS_SSL_HAVE_GCM)
+#if defined(PSA_WANT_ALG_GCM)
 #if defined(PSA_WANT_ALG_SHA_384)
 #define MBEDTLS_TEST_HAS_TLS1_3_AES_256_GCM_SHA384
 #endif
 #if defined(PSA_WANT_ALG_SHA_256)
 #define MBEDTLS_TEST_HAS_TLS1_3_AES_128_GCM_SHA256
 #endif
-#endif /* MBEDTLS_SSL_HAVE_GCM */
+#endif /* PSA_WANT_ALG_GCM */
 #if defined(MBEDTLS_SSL_HAVE_CCM) && defined(PSA_WANT_ALG_SHA_256)
 #define MBEDTLS_TEST_HAS_TLS1_3_AES_128_CCM_SHA256
 #define MBEDTLS_TEST_HAS_TLS1_3_AES_128_CCM_8_SHA256