RFXCOM RFXtrx allow multiple (both 433 and 868)

Feature Requests
1

For a long time I use the RFXCOM RFXtrx integration with a 433Mhz transceiver.

Now I also bought a 868Mhz transceiver and try to use it in HA. But when I try to add the 868Mhz transceiver using the RFXCOM RFXtrx integration I got the message only one configuration is possible.

It would be nice if I can use both.