tools/power/x86/intel-speed-select: Remove cpu mask display for non-cpu power domain

Non CPU power domains will not have any CPUs. So don't display any CPU
count or enable mask.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[srinivas.pandruvada@linux.intel.com: subject and changelog edits]
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

tools/power/x86/intel-speed-select/isst-display.c

@@ -356,6 +356,7 @@ void isst_ctdp_display_information(struct isst_id *id, FILE *outf, int tdp_level
 			 ctdp_level->level);
 		format_and_print(outf, level + 1, header, NULL);
 
+		if (id->cpu >= 0) {
 			snprintf(header, sizeof(header), "cpu-count");
 			j = get_cpu_count(id);
 			snprintf(value, sizeof(value), "%d", j);
@@ -382,6 +383,7 @@ void isst_ctdp_display_information(struct isst_id *id, FILE *outf, int tdp_level
 					     ctdp_level->core_cpumask);
 				format_and_print(outf, level + 2, header, value);
 			}
+		}
 
 		snprintf(header, sizeof(header), "thermal-design-power-ratio");
 		snprintf(value, sizeof(value), "%d", ctdp_level->tdp_ratio);