When SAP and STA both are in 11n mode then STA doesn't populate
twt_req bit during assoc req. Because of this TWT commands failed.
As part of fix, check the below variable before setting twt_req
1. TWT requestor support from firmware
2. Enable TWT ini
3. TWT ini support in 11n
4. TWT requestor support from host
Set twt_requestor bit only if all above variable are set.
Change-Id: I77f2397f986b517cd5292109927eece7fdb4c7c1
CRs-Fixed: 3210015
e526ca28f2