wlcore: allow multiple aps interface combination

Allow bringing up to 2 ap interfaces up.

TODO: make it 18xx only.
Signed-off-by: Eliad Peller <eliad@wizery.com>
wlcore: update apis to support multi-ap

Some modifications were done to the driver-fw api
in order to support multiple APs.

Signed-off-by: Eliad Peller <eliad@wizery.com>
wl18xx: update statistics acx and debugfs files

Sync the driver statistics acx and debugfs representation
with the current fw api.

Signed-off-by: Eliad Peller <eliad@wizery.com>