[rdk-b][mt7986][wifi-hal][Add DFS related functions]

[Description]
Add get and set dfs enable and refactor dfs support.
If set dfs disable, we would also set acs_exclude_dfs in hostapd config and possible channel should not reponse dfs channel.

[Release-log]
N/A

Change-Id: I05b9d7f419705609a2c3e18667365ed8e9f072ac
1 file changed
tree: 42469b187f2befa49da00d6e5edcc4cbd4099588
  1. src/