Merge ath-next from git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git

ath.git patches for 4.20. Major changes:

ath10k

* limit available channels via DT ieee80211-freq-limit

wil6210

* add 802.11r Fast Roaming support for AP and station modes

* add support for channel 4