Support WiFi hardware capabilities

[rgaudin]

Various RPIs bundles different WiFi capabilities. At least for the models with on-chip WiFi, it would be good to detect the model and adjust the WiFi (AP configuration mostly) settings to make use of those features.
For other models, most likely relying on external WiFi (do we still have such scenarios in the field?), we may imagine some opt-in options in the YAML file.

Pi	WiFi
1A+	-
1B+	-
2B	-
3A+	2.4GHz and 5GHz IEEE 802.11.b/g/n/ac wireless LAN
3B	BCM43438 wireless LAN
3B+	2.4GHz and 5GHz IEEE 802.11.b/g/n/ac wireless LAN
pi4-B	2.4 GHz and 5.0 GHz IEEE 802.11ac wireless
pi400	Dual-band (2.4GHz and 5.0GHz) IEEE 802.11b/g/n/ac wireless LAN
Pico W/WH	2.4GHz 802.11n wireless LAN
Zero	-
Zero W	802.11 b/g/n wireless LAN
Zero 2 W	2.4GHz 802.11 b/g/n wireless LAN

[rgaudin]

We've reduced the list of supported hardware to Pi 3B 3B+ 4B 400 Zero2W

[kelson42]

So I guess we can close this ticket?

[rgaudin]

Nope! It just limits the scope of what we should be able to support. We still only provide 802.11g