selftests/resctrl: Disable MBA and MBM tests for AMD

For now, disable MBA and MBM tests for AMD. Deciding test pass/fail
is not clear right now. We can enable when we have some clarity.

Signed-off-by: Babu Moger <[e-mail]>
Co-developed-by: Fenghua Yu <[e-mail]>
Signed-off-by: Fenghua Yu <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/resctrl/cat_test.c

···
 				allocated_cache_lines * 100;
 
 	printf("%sok CAT: cache miss rate within %d%%\n",
-	       abs((int)diff_percent) > MAX_DIFF_PERCENT ? "not " : "",
-	       MAX_DIFF_PERCENT);
+	       !is_amd && abs((int)diff_percent) > MAX_DIFF_PERCENT ?
+	       "not " : "", MAX_DIFF_PERCENT);
 	tests_run++;
 	printf("# Percent diff=%d\n", abs((int)diff_percent));
 	printf("# Number of bits: %d\n", no_of_bits);

tools/testing/selftests/resctrl/resctrl_tests.c

···
 	check_resctrlfs_support();
 	filter_dmesg();
 
-	if (mbm_test) {
+	if (!is_amd && mbm_test) {
 		printf("# Starting MBM BW change ...\n");
 		if (!has_ben)
 			sprintf(benchmark_cmd[5], "%s", "mba");
···
 		tests_run++;
 	}
 
-	if (mba_test) {
+	if (!is_amd && mba_test) {
 		printf("# Starting MBA Schemata change ...\n");
 		if (!has_ben)
 			sprintf(benchmark_cmd[1], "%d", span);