Initial go at adding the CableLabs Dual Channel Wi-Fi dissector.
Changes:
. New dissector for CableLabs Layer-3 Protocol ("CL3") IEEE EtherType 0xB4E3
. New dissector for Dual Channel Wi-Fi (Subprotocol of CL3)
. Defined EtherType macro for CL3 + description
Bug: 15818
Change-Id: I6edf99d40883c1890659185cc3f0524a2218a6c4
Reviewed-on: https://code.wireshark.org/review/33440
Reviewed-by: Anders Broman <a.broman58@gmail.com>