ath10k: import Atheros/QCA's ath10k driver
This version is based on
https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/log/?h=master
6bae9de622d3ef4805aba40e763eb4b0975c4f6d
and was committed to FreeBSD main as
da8fa4e37a0c048a67d7baa3b5a9bed637d02564.