arm64: dts: qcom: sdm845-audio-wcd9340: commonize pinctrl

Pin configuration fow WCD9340 is the same in all users, so move it to
common file to reduce the code duplication (which still allows further
customizations per board).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230123084300.22353-5-krzysztof.kozlowski@linaro.org