git: edcaf9a46fb0..731c85b79831 - vendor/Linux/mt76 - vendor branch updated

[Bjoern A. Zeeb]

The branch vendor/Linux/mt76 has been updated by bz:

URL: https://cgit.FreeBSD.org/src/log/?id=edcaf9a46fb0..731c85b79831

731c85b79831 mt76: update Mediatek's mt76 driver