1. Since BLE full-scan feature for BLE mesh change the controller code cause this problem,
it cause coex semaphore take in "interrupt disable", then it may cause task schedule
and cause crash in freertos
2. Fix newlib lock ISR context and critical section check
3. Fix bt controller ISR context and critical section check
1. Fix high beacon and broadcast packets loss ratio of WiFi to
make MDNS test pass.
2. Improve stability of WiFi performance with a little sacrifice
of throughput.
3. Improve BLE advertising and connection performance with
dynamic priority. It sacrifices a little WiFi throughput, but
achieves balance between WiFi and Bluetooth.
1.Bugfix btdm sleep twice after wakeup request
2.Set the minimum encryption key size to be 7 octects for BR/EDR link for preventing KNOB attack
This patch is to address the CVE-2019-9506 vulnerability.
