Fix cpu facts for hosts missing fields in cpuinfo (16533) (#16535)

Change linux fact gathering to correctly gather ansible_processor_count
and ansible_processor_vcpus on systems without vendor_id/model_name in
/proc/cpuinfo (for ex, ppc64/POWER)

lib/ansible/module_utils/facts.py

@@ -1121,8 +1121,10 @@ class LinuxHardware(Hardware):
             elif key == '# processors':
                 self.facts['processor_cores'] = int(data[1].strip())
 
-        if vendor_id_occurrence == model_name_occurrence:
-            i = vendor_id_occurrence
+        # Skip for platforms without vendor_id/model_name in cpuinfo (e.g ppc64le)
+        if vendor_id_occurrence > 0:
+            if vendor_id_occurrence == model_name_occurrence:
+                i = vendor_id_occurrence
 
         if self.facts['architecture'] != 's390x':
             if xen_paravirt: