[review] core: pta: test: invoke pta command to test interrupt notif

Yet another build failure reported by CI builds: missing __maybe_unsued.

Signed-off-by: Etienne Carriere <[email protected]>

core/kernel/notif.c

@@ -307,7 +307,7 @@ TEE_Result notif_itr_register(struct notif_itr *notif)
 {
 	unsigned int itr_num = 0;
 	uint32_t exceptions = 0;
-	const struct notif_itr_ops *ops = NULL;
+	const __maybe_unused struct notif_itr_ops *ops = NULL;
 
 	assert(notif && is_unpaged(notif));
 	itr_num = notif->itr_num;