Add nxp,lpc3220-i2s DT binding documentation.
Signed-off-by: Piotr Wojtaszczyk <piotr.wojtaszczyk@timesys.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20240627150046.258795-4-piotr.wojtaszczyk@timesys.comSigned-off-by: Mark Brown <broonie@kernel.org>