Bug#985632: firmware-brcm80211: [REGRESSION] RPi4B 5GHz WiFi stopped working with 20210208-4, 20201218-3 was fine

[Ryutaroh Matsumoto]

Control: found -1 20210315-1

> I will re-check 20210315-1.

The system boots with 20210315-1 and the reported symtom remains in
the same way. Ryutaroh