qcacld-3.0: Add ini to support BT SCO-WLAN coex

Add ini gBtScoAllowWlan2GScan to support BT SCO-WLAN coex.
Using this ini can control whether allow wlan 2g scan or not
when BT SCO connection is on.

Change-Id: Ia63b1ff92e75937487827c34bca1d2e1c289962d
CRs-Fixed: 2464679
4 files changed