fix demo, not sdk

AIFit-Demo/SearchDeviceVC.m

     BOOL willAdd = YES;
     for (DeviceModel *model in self.peripheralArray) //avoid add the same device
     {
-        if ([model.deviceAddress isEqualToString:deviceModel.deviceAddress] && [model.deviceName isEqualToString:deviceModel.deviceName])
+//        if ([model.deviceAddress isEqualToString:deviceModel.deviceAddress] && [model.deviceName isEqualToString:deviceModel.deviceName])
+        if ([model.deviceAddress isEqualToString:deviceModel.deviceAddress])
         {
             willAdd = NO;
         }