arm64: dts: qcom: sdm845: move codec to separate file

Re-organize SDM845 audio codec into separate, audio DTSI which
should be included and customized by the SDM845 boards wanting audio.
The codec node is anyway not a property of the SoC, but the boards.

On all others boards not using audio, keep the Slimbus node disabled as
it is empty.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230123084300.22353-4-krzysztof.kozlowski@linaro.org