wlan: Protect cfg80211 ops functions from SSR

Protect cfg80211 ops functions from accessing deallocated
and unitialized data structures while SSR is in progress

Change-Id: Ib459729da823eb6305b725e50634449f358e44f4
CRs-Fixed: 684136
wlan: cap the TX power limits by the regulatory limits in NV

db.txt provides power limits per band per country, but a
mechanism should be provided so that the power limits are
capped by  the h/w, s/w specific regulatory conformace results.

To achieve this cap the TX power values to the values programmed
in NV for a regulatory domain corresponding to the country of
operation. The conformance test results have to be poulated in the
NV for all the supported regulatory domians as per this arrangement.

Change-Id: Iaf91486556dec9f98298caa60f0eeb438eac7080
CRs-Fixed: 689511
wlan: Fix missing interface file to handle feature as per requirement

This fix modifies the missing interface file to handle feature as per
its requirement

Change-Id: Ibe8fb7ebddb062267c29fec9a7cc85206c3387c8
CRs-Fixed: 687368
Wlan: Revision 3.2.3.373

Revision 3.2.3.373

Change-Id: I360d22ca43927734dd5aaf6c599f48335b93bdf4
CRs-Fixed: 688141