feat(ff-a): define framework notification helpers

Defined the helpers to process framework notifiactions.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I979162363898b4f9bf1a3d57327078364883b896
diff --git a/spm/cactus/cactus_tests/cactus_test_notifications.c b/spm/cactus/cactus_tests/cactus_test_notifications.c
index 6d7b41b..420f942 100644
--- a/spm/cactus/cactus_tests/cactus_test_notifications.c
+++ b/spm/cactus/cactus_tests/cactus_test_notifications.c
@@ -109,8 +109,8 @@
 	VERBOSE("Notifications returned:\n"
 			"   from sp: %llx\n"
 			"   from vm: %llx\n",
-		ffa_notifications_get_from_sp(ret),
-		ffa_notifications_get_from_vm(ret));
+		ffa_notification_get_from_sp(ret),
+		ffa_notification_get_from_vm(ret));
 
 	/* If requested to check the status of NPI, for the respective CPU. */
 	if (cactus_notifications_check_npi_handled(*args)) {
@@ -126,8 +126,8 @@
 	}
 
 	return cactus_notifications_get_success_resp(
-		vm_id, source, ffa_notifications_get_from_sp(ret),
-		ffa_notifications_get_from_vm(ret));
+		vm_id, source, ffa_notification_get_from_sp(ret),
+		ffa_notification_get_from_vm(ret));
 }
 
 CACTUS_CMD_HANDLER(notifications_set, CACTUS_NOTIFICATIONS_SET_CMD)