feat(mpam): add MPAM system registers access test

Added a test which reads MPAM system registers to ensure that
EL3 is giving permission to Non-secure EL2 to access these registers.

Change-Id: Ie701a19c9682df6d6aeaec086954e275afff1843
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
diff --git a/tftf/tests/tests-cpu-extensions.mk b/tftf/tests/tests-cpu-extensions.mk
index 0b1839a..b0af1a3 100644
--- a/tftf/tests/tests-cpu-extensions.mk
+++ b/tftf/tests/tests-cpu-extensions.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2018-2023, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2024, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -11,6 +11,7 @@
 	extensions/ecv/test_ecv.c					\
 	extensions/fgt/test_fgt.c					\
 	extensions/pmuv3/test_pmuv3.c					\
+	extensions/mpam/test_mpam.c					\
 	extensions/mte/test_mte.c					\
 	extensions/pauth/test_pauth.c					\
 	extensions/sme/test_sme.c					\