Update from a new firmware branch. This also fixes a regression with ath10k
frequently disconnecting:

http://lists.infradead.org/pipermail/ath10k/2017-August/010062.html

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>