qcacld-3.0: Populate ASSOC IE length in roam offload scan cmd
In function csr_roam_offload_scan while copying ASSOC IEs, also populate
ASSOC IE length, else firmware wont get any ASSOC IE and REASSOC request
will not be consistent with ASSOC request.
Change-Id: I99af48b2f491d0bc7491a88b455e3636ea8e4eff
CRs-Fixed: 1090869