Channel contexts aren't iterable until after
they've been added to the driver. The code assumed
otherwise.
This problem could result in:
* rx_channel being NULL and forcing Rx path to go
the slow way to get channel on QCA988X,
* report incorrect channel when running
multi-channel on QCA61X4 hw2.1,
* report incorrect channel after AP channel
switch.
Fixes: 500ff9f9389d ("ath10k: implement chanctx API") Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>