Fix flex6xxx RFPOWER_METER_WATTS

rigs/kenwood/flex6xxx.c

@@ -771,6 +771,7 @@ int powersdr_get_level(RIG *rig, vfo_t vfo, setting_t level, value_t *val)
         break;
 
     case RIG_LEVEL_RFPOWER_METER:
+    case RIG_LEVEL_RFPOWER_METER_WATTS:
         cmd = "ZZRM5";
         len = 5;
         ans = 3;