Convert fsl,audmix.txt to yaml to let dtb check tools check audmix part.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://msgid.link/r/20240321150401.2464783-1-Frank.Li@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>