wcn36xx: enable the beaconing in mesh mode

Enable the beaconing in wnc36xx by tweaking the tim offset and
force the use of AP-style beaconing. Otherwise, beaconing is not
working. The tim offset is set to 256. Otherwise, this will
overwrite mesh beacon submitted by mac80211

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@cozybit.com>
wcn36xx: enable beacon change using BSS_CHANGED_BEACON

Enable the beacon changed using BSS_CHANGED_BEACON. This is
especially useful for mesh mode.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@cozybit.com>
Merge pull request #128 from chunyeow/ft-mesh-support

Enable Mesh Beaconing and Changed