qcacld-3.0: Remove RRM ie in Assoc Req based on AP capability

RRM ie should not be present in association req if AP doesn't
support 11k. As a part of fix add the check to append RMM ie only
if AP support 11k.

Change-Id: I4e521dbdbdd5b083360405f26913278788c86555
CRs-Fixed: 961737