feat: add tests to check SCTLR2, THE and D128 sysregs

This patch adds test cases for verifying that the system registers of
FEAT_SCTLR2, FEAT_THE and FEAT_D128 (FEAT_SYSREG128) are working
correctly by performing a series of reads and writes to the registers.

Change-Id: I5c102daa358a7ec5d1801395bc875e9850e83939
Signed-off-by: Igor Podgainõi <igor.podgainoi@arm.com>
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
diff --git a/include/common/test_helpers.h b/include/common/test_helpers.h
index 8de7a86..fe29ee5 100644
--- a/include/common/test_helpers.h
+++ b/include/common/test_helpers.h
@@ -327,6 +327,30 @@
 		}								\
 	} while (false)
 
+#define SKIP_TEST_IF_SCTLR2_NOT_SUPPORTED()					\
+	do {									\
+		if (!is_feat_sctlr2_supported()) {				\
+			tftf_testcase_printf("FEAT_SCTLR2 not supported\n");	\
+			return TEST_RESULT_SKIPPED;				\
+		}								\
+	} while (false)
+
+#define SKIP_TEST_IF_THE_NOT_SUPPORTED()					\
+	do {									\
+		if (!is_feat_the_supported()) {					\
+			tftf_testcase_printf("FEAT_THE not supported\n");	\
+			return TEST_RESULT_SKIPPED;				\
+		}								\
+	} while (false)
+
+#define SKIP_TEST_IF_D128_NOT_SUPPORTED()					\
+	do {									\
+		if (!is_feat_d128_supported()) {				\
+			tftf_testcase_printf("FEAT_D128 not supported\n");	\
+			return TEST_RESULT_SKIPPED;				\
+		}								\
+	} while (false)
+
 #define SKIP_TEST_IF_RME_NOT_SUPPORTED_OR_RMM_IS_TRP()				\
 	do {									\
 		u_register_t retrmm = 0U;					\