esp_codec_dev: Fix volume setting for ES8374 (AUD-5742)

[robert-alfaro]

Description

Fixes output volume setting for ES8374 codec in the esp_codec_dev component. Bug was introduced when the component was created. The problem is the db_value, mapped from a volume integer, needs to be converted to a register value, however the incorrect method esp_codec_dev_vol_calc_db is used. It should be esp_codec_dev_vol_calc_reg.

Related

Testing

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[CLAassistant]

All committers have signed the CLA.

[robert-alfaro]

@TempoTian

[TempoTian]

I have prepared a commit for this change, it will merge soon. For we internally manage gitlab, to keep code consistent, we need commit from internal gitlab.
Thanks for your efforts！