Add GreenPowerProxy

Author: nworbneb

zhaquirks/tuya/ts0121_plug.py

@@ -1,7 +1,7 @@
 """Tuya TS0121 plug."""
 from zigpy.profiles import zgp, zha
 from zigpy.quirks import CustomDevice
-from zigpy.zcl.clusters.general import Basic, Groups, Identify, OnOff, Ota, Scenes, Time
+from zigpy.zcl.clusters.general import Basic, GreenPowerProxy, Groups, Identify, OnOff, Ota, Scenes, Time
 from zigpy.zcl.clusters.homeautomation import ElectricalMeasurement
 from zigpy.zcl.clusters.smartenergy import Metering