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@xxxxxxxxxx>
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Changes since v2:
1. Drop sound node in DTSI - affects devices.
2. Drop "audio" from DTSI file name.
Changes since v1:
1. Move also sound node.
2. Rewrite commit msg.
RFC - please kindly test the boards.