qcacld-3.0: Set passive dwell time

Set passive dwell time to 28msecs for active
scan when bt a2dp is enabled and hw is not dbs
capable and when sta is connected on 2G band.

Change-Id: I44f2e3d98f2d7ddc52e4902ba989131c256da4ef
CRs-Fixed: 2146311

core/hdd/src/wlan_hdd_cfg80211.c

@@ -11915,6 +11915,7 @@ void hdd_bt_activity_cb(void *context, uint32_t bt_activity)
 	else
 		return;
 
+	ucfg_scan_set_bt_activity(hdd_ctx->hdd_psoc, hdd_ctx->bt_a2dp_active);
 	hdd_debug("a2dp_active: %d vo_active: %d", hdd_ctx->bt_a2dp_active,
 		 hdd_ctx->bt_vo_active);
 }