[osxsink] - properly set the ae device type based on either ca or heuristical criteria - fixes DisplayPort not detected as LPCM capable and maybe others

Conflicts:
	xbmc/cores/AudioEngine/Sinks/AESinkDARWINOSX.cpp
Merge pull request #4348 from Memphiz/osxdisplayportbp

 [osxsink] - properly set the ae device type based on either ca or ...