qcacld-3.0: Check SBS supported or not before set hw mode

If the request is SBS action and the HW doesn't support SBS,
return QDF_STATUS_E_NOSUPPORT. The caller will continue to
connect/start_ap instead of failure when
policy_mgr_current_connections_update return
QDF_STATUS_E_NOSUPPORT.

Change-Id: I158f90c13e2685697b82c874a247883f21f013cb
CRs-Fixed: 2602194
1 file changed