dt-bindings: sound: add Microsemi ZL38060 binding

Add devicetree binding for the Microsemi ZL38060 Connected
Home Audio Processor.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Link: https://lore.kernel.org/r/20200417221341.31428-1-TheSven73@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>