tools/power turbostat: Fix incorrect sorting of PMT telemetry

JIRA: https://issues.redhat.com/browse/RHEL-127415

commit cafb47b
Author: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Date:   Sat Aug 9 10:35:15 2025 +0530

    tools/power turbostat: Fix incorrect sorting of PMT telemetry

    The pmt_telemdir_sort() comparison function was returning a boolean
    value (0 or 1) instead of the required negative, zero, or positive
    value for proper sorting. This caused unpredictable and incorrect
    ordering of telemetry directories named telem0, telem1, ..., telemN.
    Update the comparison logic to return -1, 0, or 1 based on the
    numerical value extracted from the directory name, ensuring correct
    numerical ordering when using scandir.

    This change improves stability and correctness when iterating PMT
    telemetry directories.

    Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
    Signed-off-by: Len Brown <len.brown@intel.com>

(cherry picked from commit cafb47b)
Assisted-by: Patchpal
Signed-off-by: David Arcari <darcari@redhat.com>

Author: darcari

tools/power/x86/turbostat/turbostat.c

@@ -1890,7 +1890,7 @@ int pmt_telemdir_sort(const struct dirent **a, const struct dirent **b)
 	sscanf((*a)->d_name, "telem%u", &aidx);
 	sscanf((*b)->d_name, "telem%u", &bidx);
 
-	return aidx >= bidx;
+	return (aidx > bidx) ? 1 : (aidx < bidx) ? -1 : 0;
 }
 
 const struct dirent *pmt_diriter_next(struct pmt_diriter_t *iter)