qcacld-3.0: Reject SAP concurrency with monitor mode

Currently, SAP interface is being created when there is an existing
monitor mode interface. This concurrency is not allowed.

To avoid this, Add check for existing monitor mode interface before
creating SAP interface using add virtual interface.

Change-Id: Ia2318b880adaff39b7deb9e223140906e80a91ae
CRs-Fixed: 2680143
1 file changed