ASoC: dt-bindings: fsl,audmix: Add support for i.MX952 platform

ASoC: dt-bindings: fsl,audmix: Add support for i.MX952 platform

Add a compatible string for i.MX952 platform.

There is a power domain on i.MX952 for the mix system of AUDMIX.
But it is enabled by default, AUDMIX device don't need to enable it,
so make the power-domains to be optional on i.MX952, and be required on
i.MX8QM.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260123082501.4050296-2-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>