wifi: iwlwifi: mvm: enable TX beacon protection

Check hardware/firmware support and enable TX beacon protection
as well if supported, programming the key into the firmware as
usual.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230320122330.6a90a4f4f469.Ia028dea75f9a8eed40786d876d51f97fb3142688@changeid


Signed-off-by: Johannes Berg <johannes.berg@intel.com>