dt-bindings: es8328: convert to DT schema format

Convert the binding to DT schema format. Note, that "IPVDD-supply"
got fixed to be "HPVDD-supply" during the conversion. This was
obviously a typo in the old binding. The old binding example, DT
files, chip datasheet and Linux driver use HPVDD.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231109184453.108676-1-sebastian.reichel@collabora.com


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