ARC, Audio Return Channel is newly introduced in HDMI CEC 1.4.
Here is a list of new command
<Initiate ARC>
<Report ARC Initiated>
<Report ARC Terminated>
<Request ARC Initiation>
<Request ARC Termination>
<Terminate ARC>
Along with it replaced <Get OSD Name> with <Give OSD Name>
which is renamed in CEC 1.4.
Change-Id: If4a7aedef839c8413a8e3b5f66f3df0c7234104b
be9cd8eb3f