NCSDK-36359: Enable HW rollback protection in the A/B split slot sample

[tomchy]

Enable HW rollback protection in the A/B split slot sample.

[Copilot]

Pull request overview

This PR enables hardware-based rollback protection in the A/B split slot DFU sample by integrating the IronSide counter service with MCUboot. The changes update dependency revisions and add necessary configuration options.

• Updates Zephyr and MCUboot dependencies to pull request branches that support IronSide counters
• Enables IronSide counter service in MCUboot configuration
• Activates hardware-based downgrade prevention in the sysbuild configuration

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
west.yml	Updates Zephyr and MCUboot revisions to pull request branches
samples/dfu/ab_split/sysbuild/mcuboot/prj.conf	Enables IronSide counter service and MCUboot IronSide counter implementation
samples/dfu/ab_split/sysbuild.conf	Enables hardware-based downgrade prevention configuration

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[NordicBuilder]

The following west manifest projects have changed revision in this Pull Request:

Name	Old Revision	New Revision	Diff

✅ All manifest checks OK

Note: This message is automatically posted and updated by the Manifest GitHub Action.

[NordicBuilder]

CI Information

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Build number: 3

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Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (0)

Outputs:

Toolchain

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Build docker image:

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ❌ Toolchain
• ❌ Build twister
• ❌ Integration tests

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[github-actions]

You can find the documentation preview for this PR here.

[shanthanordic]

PR not ready moving it out of 3.2.0 scope

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