dt-bindings: clock: fsl,imx8-acm: Add audio clock mux support

dt-bindings: clock: fsl,imx8-acm: Add audio clock mux support

Add the clock dt-binding file for Audio Clock Mux. which
is the IP for i.MX8QM, i.MX8QXP, i.MX8DXL.

Add the clockid for clocks in header file.

The Audio Clock Mux is binded with all the audio IP and audio clocks
in the subsystem, so need to list the power domain of related clocks
and IPs. Each clock and IP has a power domain, so there are so many
power domains.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/1690260984-25744-2-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>