descrube update #9191 custom LOGLEVEL with UBOOT_LOGLEVEL

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Walkthrough

A documentation addition describing the UBOOT_LOGLEVEL parameter, which controls U-Boot log verbosity levels (0-9, default 6) by setting CONFIG_LOGLEVEL and CONFIG_LOG_MAX_LEVEL during image building. No code modifications or functional changes—purely descriptive content inserted into the build switches documentation.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested labels

Needs review, size/small

Suggested reviewers

• igorpecovnik

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (2 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title contains a typo ('descrube' instead of 'describe') and is unclear; it references issue #9191 but doesn't clearly convey that documentation about UBOOT_LOGLEVEL is being added.	Correct the typo and clarify the title to better describe the main change, such as 'Add UBOOT_LOGLEVEL documentation' or 'Document UBOOT_LOGLEVEL configuration option'.
Description check	❓ Inconclusive	No pull request description was provided by the author, making it impossible to assess whether any context or explanation for the changes was documented.	Add a pull request description explaining the purpose of the documentation update and any relevant context related to issue #9191.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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