qcacld-3.0: Remove btm cap in SAE assoc req if SAE roam disabled

Some legacy Helium firmware doesn't support SAE roaming, but btm cap is set
in associate request of DUT, then connected SAE AP thinks DUT supports btm,
AP will send btm request to DUT, DUT triggers roam, but roam fails and
disconnects from current AP, users will complain this unexpected
disconnect.

Change-Id: Ife9860addef6898a518618f555158e7888ac74db
CRs-Fixed: 2884694