Fix for SDMMC driver on ESP32-P4

[KenVanHoeylandt]

The driver was using the incorrect (read: old) if-defs for a capability check.

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated ESP32 SDMMC power-control compilation guards to use SOC_SDMMC_IO_POWER_EXTERNAL. The power-control handle declaration, LDO driver setup, mount-failure cleanup, and unmount cleanup now use the new guard. The LDO channel conversion also uses static_cast<int>. Public interfaces and API wiring remain unchanged.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
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.
Title check	✅ Passed	The title accurately reflects the ESP32-P4 SDMMC fix and matches the driver-focused changes in the pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-sdmmc-esp32p4

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