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arm64: dts: qcom: msm8916-acer-a1-724: Add sound and modem #341

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qcom,micbias-lvl = <2800>;
qcom,mbhc-vthreshold-low = <150 150 500 500 500>;
qcom,mbhc-vthreshold-high = <150 150 500 500 500>;
qcom,hphl-jack-type-normally-open;
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The microphone/input doesn't switch between earpiece/speaker and headset automatically, but output does.

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Headset microphone breaks buttons...

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Looks similar to #353

Enable sound and modem for Acer Iconia Talk S A1-724.
The setup is similar to most MSM8916 devices, i.e.:

- QDSP6 audio
- Earpiece/headphones/microphones via digital/analog codec in
  MSM8916/PM8916
- WWAN Internet via BAM-DMUX

v2: Fix DMIC1
v3: use model = "acer-a1-724";
Signed-off-by: Raymond Hackley <raymondhackley@protonmail.com>
Signed-off-by: Raymond Hackley <raymondhackley@protonmail.com>
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