rockchip64: Drop upstreamed i2s-tdm patch

[retro98boy]

Description

The rk3308-i2s-default-rate.patch has been merged into the upstream of versions 6.18.y and 6.19.y

6.18.14: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.18.y&id=9fbb4f14462f0830516694dc7ea7be5d70e6ca3b

6.19.4: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.19.y&id=f8e4d41dc66790f6585e731c68a91bbe0af77c96

GitHub issue reference: #9443

Jira reference number: AR-2822

How Has This Been Tested?

./compile.sh kernel BOARD=smart-am40 BRANCH=current RELEASE=noble

./compile.sh kernel BOARD=smart-am40 BRANCH=edge RELEASE=noble

Summary by CodeRabbit

• Revert
  • Removed automatic default clock rate assignment for Rockchip RK3308 I2S audio devices.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📥 Commits

Reviewing files that changed from the base of the PR and between 12f4e9f and 7ed434c.

📒 Files selected for processing (2)

• patch/kernel/archive/rockchip64-6.18/rk3308-i2s-default-rate.patch
• patch/kernel/archive/rockchip64-6.19/rk3308-i2s-default-rate.patch

💤 Files with no reviewable changes (2)

• patch/kernel/archive/rockchip64-6.18/rk3308-i2s-default-rate.patch
• patch/kernel/archive/rockchip64-6.19/rk3308-i2s-default-rate.patch

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📝 Walkthrough

Walkthrough

This PR removes default MCLK rate handling from two rockchip64 kernel I2S patches (versions 6.18 and 6.19). The removed code previously provided fallback clock rate configuration when set_sysclk was not invoked in rockchip_i2s_tdm_hw_params.

Changes

Cohort / File(s)	Summary
Rockchip I2S Default Rate Removal patch/kernel/archive/rockchip64-6.18/rk3308-i2s-default-rate.patch, patch/kernel/archive/rockchip64-6.19/rk3308-i2s-default-rate.patch	Removed DEFAULT_MCLK_FS definition (256) and associated fallback logic that set default master clock rates in rockchip_i2s_tdm_hw_params when set_sysclk was not called. Includes removal of conditional mclk_rate assignment and clk_set_rate call with error handling.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 Whiskers twitching, a cleanup so fine,
Two patches removed, time to align,
Default rates gone, the code now runs light,
Simpler and cleaner—oh, what a delight! 🎉

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 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: removing local patches that have been merged upstream into Linux stable branches.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

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

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[github-actions]

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