arm64: dts: qcom: apq8016-sbc: Fix dtbs_check warnings for &sound

qcom,apq8016-sbc-sndcard is now covered by the qcom,sm8250.yaml schema
which has slightly different recommendations for the naming of
properties and nodes. The old naming is still functional but
deprecated. Update the &sound node in apq8016-sbc to fix the following
dtbs_check warnings:

  apq8016-sbc.dt.yaml: sound@7702000: 'model' is a required property
    From schema: sound/qcom,sm8250.yaml
  apq8016-sbc.dt.yaml: sound@7702000: 'external-dai-link@0', ...
    do not match any of the regexes: '.*-dai-link$', ...
    From schema: sound/qcom,sm8250.yaml

Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211214135124.2380-1-stephan@gerhold.net