Jeff Epler 47541afc7c
picow: ask at a lower level if the interface is up
Closes: #7072

```
Adafruit CircuitPython 8.0.0-beta.2-9-g5192082e64-dirty on 2022-10-17; Raspberry Pi Pico W with rp2040
>>> import wifi
>>> print(wifi.radio.ipv4_address)
None
>>> import os
>>> wifi.radio.connect(os.getenv('WIFI_SSID'), os.getenv('WIFI_PASSWORD'))
>>> print(wifi.radio.ipv4_address)
10.0.2.94
```
2022-10-17 10:08:50 -05:00
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