ASoC: dt-bindings: nau8810: Convert to dtschema

Convert the NAU8810 audio CODEC bindings to DT schema.

Signed-off-by: David Lin <CTLIN0@nuvoton.com>
Link: https://lore.kernel.org/r/20230516054447.1081404-1-CTLIN0@nuvoton.com


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