Fix typo in pddf_current_sensor constructor (sonic-net#22997)

Line #27 self.display_name = self.sensor_data should be self.display_name = self.sensor_obj

Author: michaelc-nexthop

platform/pddf/platform-api-pddf-base/sonic_platform_pddf_base/pddf_current_sensor.py

@@ -24,7 +24,7 @@ def __init__(self, index, pddf_data=None, pddf_plugin_data=None):
             raise ValueError(f"Current sensor {self.sensor_obj_name} not found in PDDF data")
 
         self.sensor_obj = self.pddf_obj.data[self.sensor_obj_name]
-        self.display_name = self.sensor_data.get('dev_attr', {}).get('display_name', self.sensor_obj_name)
+        self.display_name = self.sensor_obj.get('dev_attr', {}).get('display_name', self.sensor_obj_name)
 
     def get_name(self):
         if 'dev_attr' in self.sensor_obj.keys():
@@ -92,4 +92,4 @@ def get_low_critical_threshold(self):
         else:
             attr_value = float(output['status'])
 
-        return attr_value
+        return attr_value