sm8550: Restore kernel 6.18.y for current and edge branch

[kasimling]

This reverts commit 9ce5fd3.

Now the problem https://forum.armbian.com/topic/58748-cannot-complete-first-boot-wizard/ seems to be fixed. We can restore using 6.18.y branch

Summary by CodeRabbit

• Chores
  • Updated kernel version tracking to automatically follow the stable branch, ensuring builds include the latest kernel patches for improved security and stability.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

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Review profile: CHILL

Plan: Pro

Run ID: c02cac4c-b7be-4fb0-921a-1c6764fe42a9

📥 Commits

Reviewing files that changed from the base of the PR and between 73a3e49 and 49a49e0.

📒 Files selected for processing (1)

• config/sources/families/sm8550.conf

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📝 Walkthrough

Walkthrough

Configuration file updated to change kernel branch tracking from fixed version tag v6.18.18 to moving stable branch linux-6.18.y for both current and edge build targets in the SM8550 device family configuration.

Changes

Cohort / File(s)	Summary
Kernel Branch Configuration config/sources/families/sm8550.conf	Updated KERNELBRANCH values from fixed tag (tag:v6.18.18) to stable branch (branch:linux-6.18.y) for both current and edge build targets.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A branch so stable, replacing the tag,
Linux six-eighteen now leads the way,
Two targets dance to the moving beat,
Where updates flow like carrots so sweet! 🥕

🚥 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 'sm8550: Restore kernel 6.18.y for current and edge branch' clearly and concisely summarizes the main change: reverting to use kernel 6.18.y for the sm8550 family on specific branches, which matches the changeset modifications in the configuration file.
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!