Transceiver: Clean up code passing parameters to threads

TransceiverChannel naming was misleading there. It's simply a data type
used to pass 2 parameters through the void* of the thread entry
function, so let's clearly specify is a storage for thread params.
Furthermore, we don't need a full C++ class for that, let's simply use a
struct.

Change-Id: I6e3898a8a66520cc5b2a7df9b9ae01b0b272387f
2 files changed