[rdk-b][mt7986][wifi-hal][Add beacon and dtim functions]

[Description]
1. Add set and get RadioBeaconPeriod
2. Add set and get ApBeaconRate
3. Add set and get ApDTIMInterval

[Release-log]
N/A

1 file changed
tree: 4c86b8b6a226932d5b908e94d3dc1d8b8eb0fafd
  1. src/