Add binding documentation for the audio serial port interface (I2S) on
Marvell MMP SoCs.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200511210134.1224532-11-lkundrak@v3.skSigned-off-by: Mark Brown <broonie@kernel.org>