SpacemiT: Enable additional audio support in legacy and current

[pyavitz]

Feature request; https://forum.armbian.com/topic/59260-feature-request-include-snd-usb-audio-module-in-banana-pi-f3-builds/

Summary by CodeRabbit

• New Features
  • Improved audio device support with expanded USB audio drivers, MIDI v2 support, and enhanced legacy application compatibility across kernel configurations.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: a14339a9-b60a-455c-94fe-b9c80c13a6fa

📥 Commits

Reviewing files that changed from the base of the PR and between d0ab18c and 6879f40.

📒 Files selected for processing (2)

• config/kernel/linux-spacemit-current.config
• config/kernel/linux-spacemit-legacy.config

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📝 Walkthrough

Walkthrough

Linux kernel audio configuration is extended across two variant configs to enable OSS emulation through ALSA, add USB audio and MIDI v2 support, and introduce additional ASoC codec drivers and IIO auxiliary audio support.

Changes

Cohort / File(s)	Summary
Kernel Audio Configuration config/kernel/linux-spacemit-current.config, config/kernel/linux-spacemit-legacy.config	Both configs gain OSS emulation support, USB audio drivers (generic and device-specific), MIDI v2 support, and ASoC components including ALC5623 codec driver and IIO auxiliary audio support. Most additions are configured as loadable modules.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 Hop hop, the sound now rings so clear,
OSS and USB bring music near,
MIDI v2 joins the audio show,
ASoC codecs help the speakers glow,
Spacemit sings with every bound! 🎵

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: enabling additional audio support in both legacy and current kernel configurations for SpacemiT.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[github-actions]

✅ This PR has been reviewed and approved — all set for merge!