ath6kl: add device ID for WLU5150-D81

This device with a male Mini-B USB connector is part of Panasonic TVs.

Signed-off-by: André Apitzsch <git@apitzsch.eu>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220302211436.8746-1-git@apitzsch.eu