nxos_facts fix NameError (#48981)

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

lib/ansible/modules/network/nxos/nxos_facts.py

@@ -822,10 +822,16 @@ class Legacy(FactsBase):
 
     def parse_structured_power_supply_info(self, data):
         if data.get('powersup').get('TABLE_psinfo_n3k'):
-            data = data['powersup']['TABLE_psinfo_n3k']['ROW_psinfo_n3k']
+            fact = data['powersup']['TABLE_psinfo_n3k']['ROW_psinfo_n3k']
         else:
-            data = data['powersup']['TABLE_psinfo']['ROW_psinfo']
-        objects = list(self.transform_iterable(data, self.POWERSUP_MAP))
+            if isinstance(data['powersup']['TABLE_psinfo'], list):
+                fact = []
+                for i in data['powersup']['TABLE_psinfo']:
+                    fact.append(i['ROW_psinfo'])
+            else:
+                fact = data['powersup']['TABLE_psinfo']['ROW_psinfo']
+
+        objects = list(self.transform_iterable(fact, self.POWERSUP_MAP))
         return objects
 
     def parse_hostname(self, data):