Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Fix compilation error on gcc-5.2.0 - it now warns on non-paranthen'ed
logical negation when used in this fashion.

Tested:

* compile only

Expose the ANI state / statistics using the public ANI function, rather than
the ar9300_* definitions.

.. which of course don't match, and athstats was reading garbage ANI
data.

Add initial support for the HAL channel survey support to the AR9300 HAL.

This is used by the 'athsurvey' command to print out channel survey
statistics - % busy times transmit, receive and airtime.

It's as buggy and incomplete as the rest of the HAL survey support -
notably, tying into the ANI code to read channel stats and occasionally
getting garbage counters isn't very nice. It also doesn't (yet!) get
channel survey information during a scan. But it's good enough for
basic air-time debugging, which is why I'm committing it in this state.

Tested:

* AR9380, STA mode

Skip the OFDM weak signal threshold detection programming for
AR9462/AR9565.

This and some upcoming changes to the HAL for these chips should
address some of the signal sensitivity reported by users.

Tested:

* AR9462 (WB222), STA mode

Obtained from: Linux ath9k

Sync from git - ah_config is in 'ath_hal', not 'ath_hal_private' on
FreeBSD.

Bring over my FreeBSD modifications for the AR9300 HAL to make it
work in FreeBSD.

This is still heavily a work in progress but I'd rather it start
shipping in -HEAD sooner rather than later.

This doesn't (yet) link it into the build system either for a static
kernel or as a module; that will come later (after many, many make universe
tests.)

Copy the vendor branch ar9300 code from qcamain_open_hal into this
directory.

Only copy the ar9300 HAL, we don't want to grab everything.

Initial import of the QCA qcamain_open_hal repository.

Source: https://github.com/qca/qcamain_open_hal_public
Revision: 60390a9f9ac6a20db168fbbc01a4ad4e01c395ce

Thankyou to QCA for this release.