orangepi5-plus: u-boot: restore vendor uboot with blobs

[rpardini]

• 🌳 mainline AT-F only for non-vendor BRANCH
• 🍀 vendor branch uses vendor u-boot with rkbin blobs
• 🌱 sorry for the confusion; I overlooked the conditional here
• 🌴 Fixes: f45765e

Summary by CodeRabbit

• New Features

  • Added SPI boot support for Orange Pi 5 Plus.

• Chores

  • Updated boot configuration for Orange Pi 5 Plus to improve compatibility and mainline U-Boot support.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The Orange Pi 5 Plus board configuration is updated to enable SPI boot support and change the default boot scenario from "tpl-blob-atf-mainline" to "spl-blobs", while a post-configuration hook restores the mainline U-Boot boot scenario.

Changes

Cohort / File(s)	Change Summary
Board Configuration config/boards/orangepi5-plus.conf	Added SPI boot support flags (BOOT_SUPPORT_SPI, BOOT_SPI_RKSPI_LOADER). Changed default BOOT_SCENARIO from "tpl-blob-atf-mainline" to "spl-blobs". Extended post_family_config__orangepi5plus_use_mainline_uboot hook to override BOOT_SCENARIO back to "tpl-blob-atf-mainline" and re-invoke boot configuration preparation.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• opi5plus - board config maintenance #8787: Directly modifies the same Orange Pi 5 Plus board config and post_family_config mainline U-Boot hook logic.
• Rock-5B-Plus: Fix Mainline u-boot #9039: Makes related changes to BOOT_SCENARIO reassignment in mainline U-Boot hooks with prepare_boot_configuration reuse.
• orangepi5-plus: u-boot: use mainline ATF; bump to v2026.01; drop funky CE config options #9261: Directly alters the same post_family_config__orangepi5plus_use_mainline_uboot logic and SPI/boot support variables in opposing manner.

Suggested reviewers

• igorpecovnik
• EvilOlaf
• amazingfate
• paolosabatino

Poem

🐰 A boot path springs forth, SPI support takes flight,
Default flows change, but mainline's restored right,
Configuration hops between two sacred ways,
The Orange Pi hares now boot with brighter days! 🥕⚡

🚥 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 reflects the main change: restoring vendor u-boot with blobs for the orangepi5-plus board configuration.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[github-actions]

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