With increasing unicast support, the code needs to identify unicast
messages more often. This patch replaces the open coded bit field
tests with a more readable in line helper function call.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
The E2E TC forwards Announce, Delay_Req, Delay_Resp, Management,
Signaling, and Sync messages, and drops P2P Delay messages.
This implementation tracks the GM using the BMCA in order
to syntonize (or possibly even synchronize) with it.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>