feat(sys_reg_trace): add trace system registers access test

Added a test to read trace system registers to ensure that EL3
is giving permission to non-secure EL2 to access these registers.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I0bdbb5aff81a78fc3a3766278c48b25bb6e1779f
diff --git a/tftf/tests/tests-cpu-extensions.mk b/tftf/tests/tests-cpu-extensions.mk
index e5f4f79..5ceb340 100644
--- a/tftf/tests/tests-cpu-extensions.mk
+++ b/tftf/tests/tests-cpu-extensions.mk
@@ -12,6 +12,7 @@
 	extensions/pauth/test_pauth.c					\
 	extensions/sve/sve_operations.S					\
 	extensions/sve/test_sve.c					\
+	extensions/sys_reg_trace/test_sys_reg_trace.c			\
 	extensions/trbe/test_trbe.c					\
 	extensions/trf/test_trf.c					\
 	runtime_services/arm_arch_svc/smccc_arch_soc_id.c		\