arm64: dts: qcom: sc8280xp-x13s: move wcd938x codec node

The wcd938x codec is not a memory-mapped device and does not belong
under the soc node.

Move the node to the root node to avoid DT validation failures.

While at it, clean up the node somewhat by adding newline separators,
reordering properties and renaming it 'audio-codec'.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230103103141.15807-5-johan+linaro@kernel.org