ASoC: Add Renesas IDT821034 codec bindings

The Renesas IDT821034 codec is a quad PCM codec with programmable
gain.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230126085137.375814-2-herve.codina@bootlin.com


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