feat(rme): add PMU Realm tests

This patch adds Realm PMU payload tests with
PMU interrupt handling.

Signed-off-by: AlexeiFedorov <Alexei.Fedorov@arm.com>
Change-Id: I86ef96252e04c57db385e129227cc0d7dcd1fec2
diff --git a/tftf/tests/tests-standard.mk b/tftf/tests/tests-standard.mk
index d57c381..988a0b8 100644
--- a/tftf/tests/tests-standard.mk
+++ b/tftf/tests/tests-standard.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2018-2022, Arm Limited. All rights reserved.
+# Copyright (c) 2018-2023, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -24,7 +24,12 @@
 	tests-uncontainable.mk			\
 	tests-debugfs.mk			\
 	tests-rmi-spm.mk			\
+)
+
+ifeq (${ARCH},aarch64)
+TESTS_MAKEFILE += $(addprefix tftf/tests/,	\
 	tests-realm-payload.mk			\
 )
+endif
 
 include ${TESTS_MAKEFILE}