[ath_hal] add MCI bits from ath9k for QCA9565

[ath_hal] add MCI bits from ath9k for QCA9565

* Add extra debugging - the weights debugging is really useful to ensure
  things are programmed into the wlan coexistence table.  The weights are
  what traffic priority each of the various modes get (tx, tx-high-priority,
  rx-beacon, etc) if they're all zero, things work very poorly.

* Add in coex init routines from ath9k for AR9462 and QCA9565 1ANT and 2ANT.
  This control things like beacon stomping, ACK handling, antennas, PA/LNA
  shared, etc.

* Some ancillary bits.

TODO:

* There's some conditional stuff around MCI_ANT_ARCH_PA_LNA_SHARED() in ath9k
  which doesn't always enable force-on LNA.  That'll have to be examined
  and merged in as appropriate.

Obtained from:	linux ath9k