Say Y or M if you want to add support for codecs attached to the EP93xx I2S or AC97 interfaces.
Say Y or M here if you want to add support for I2S audio on the Bluewater Systems Snapper CL15 module.
Say Y or M here if you want to add support for AC97 audio on the Simplemachines Sim.One board.
Say Y or M here if you want to add support for I2S audio on the Cirrus Logic EDB93xx boards.