feat(handoff): add basic firmware handoff tests

Add tests to sanity check information shared between BL31 and NS world
using the firmware handoff framework.

Change-Id: I9d00292db7732157d0815e6159438c0db08551ad
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/tftf/tests/tests-firmware-handoff.xml b/tftf/tests/tests-firmware-handoff.xml
new file mode 100644
index 0000000..2761626
--- /dev/null
+++ b/tftf/tests/tests-firmware-handoff.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  Copyright (c) 2023, Arm Limited. All rights reserved.
+
+  SPDX-License-Identifier: BSD-3-Clause
+-->
+
+<testsuites>
+  <testsuite name="Firmware Handoff" description="Validate transfer list managed by firmware hanoff framework">
+     <testcase name="Validate transfer list header" function="test_handoff_header" />
+     <testcase name="Validate HW_CONFIG in transfer list" function="test_handoff_dtb_payload" />
+  </testsuite>
+</testsuites>