feat(trbe): add trace buffer control registers access test

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

Change-Id: I70faa5bb7e0bc648fbc3d14cb9c1b8da3470a201
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/include/common/test_helpers.h b/include/common/test_helpers.h
index 8e17140..8d24a05 100644
--- a/include/common/test_helpers.h
+++ b/include/common/test_helpers.h
@@ -247,6 +247,14 @@
 		}								\
 	} while (false);
 
+#define SKIP_TEST_IF_TRBE_NOT_SUPPORTED()					\
+	do {									\
+		if (!get_armv9_0_trbe_support()) {				\
+			tftf_testcase_printf("ARMv9-TRBE not supported\n");	\
+			return TEST_RESULT_SKIPPED;				\
+		}								\
+	} while (false)
+
 /* Helper macro to verify if system suspend API is supported */
 #define is_psci_sys_susp_supported()	\
 		(tftf_get_psci_feature_info(SMC_PSCI_SYSTEM_SUSPEND)		\