Enhancement to add CMC Chassis Controller MAC Address to enum

QwikContext
Enhancement to retrieve Chassis Controller MAC Address, not referring to FlexMAC.

Details
Requesting to add Chassis Controller MAC Address to Controller or CMC json output, if possible.

```python
cmc.get_partial_entityjson(cmc.ComponentEnum.Controller)
cmc.get_partial_entityjson(cmc.ComponentEnum.CMC)
```
If possible have as default in a enum list add Chassis Controller MAC Address, just like HostName and AssetTag. (Only for CMC, WSMan)

```python
ret['System'][0]['PermanentMACAddress']
```

Impact
No impact. This is an enhancement request.

Severity
Severity 4 - Low