ASoC: dt-bindings: fsl,imx-asrc/spdif: Add power-domains property

ASoC: dt-bindings: fsl,imx-asrc/spdif: Add power-domains property

Add power-domains property for asrc and spdif since fsl,imx8qm-asrc/spdif
and fsl,imx8qxp-asrc/spdif require 'power-domains'.

Set 'power-domains' as required property for compatible string
fsl,imx8qm-asrc/spdif and fsl,imx8qxp-asrc/spdif.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://msgid.link/r/20240328-asrc_8qxp-v8-1-801cd6bb5be2@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>