Adapt to new beacon/dtim enum semantic

The commit 989c6505cdda587f87573bb6828f23964dd3d19b changes the name of
the enum BSS_CHANGED_DTIM_PERIOD to BSS_CHANGED_BEACON_INFO.
We need to update our code to the corresponding value.

Signed-off-by: Olof Johansson <dev@skyshaper.net>
Update to new wowlan support struct

Commit 964dc9e2c3aaccacacd40640964a58544fb5769a updated the way to
configure wowlan support. This commit adapts wcn36xx to this new way.

Signed-off-by: Olof Johansson <dev@skyshaper.net>