net: wireless: bcmdhd: cfg80211 fixes

- Add wl_cfg80211_40MHz_to_20MHz_Channel() processing
- Cleanout definitions req for deep sleep
Change-Id: Ia136c274a2136482bf75309e1135c04754230624
Signed-off-by: demetris <ierokipides.dem@gmail.com>

Signed-off-by: demetris <ierokipides.dem@gmail.com>