Add test to measure latencies when turning ON a cluster

Change-Id: If698dc76c1873fb79ffe63ac6ee0c808186310ac
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/tftf/tests/tests-performance.mk b/tftf/tests/tests-performance.mk
index fc082c6..7ed87ef 100644
--- a/tftf/tests/tests-performance.mk
+++ b/tftf/tests/tests-performance.mk
@@ -1,9 +1,10 @@
 #
-# Copyright (c) 2018, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2019, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
 TESTS_SOURCES	+=	$(addprefix tftf/tests/performance_tests/,	\
 	smc_latencies.c							\
+	test_psci_latencies.c						\
 )