Add dt-bindings for the audio memory arbiter found on Amlogic's
A113 based SoCs
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de>