|SUCCESS| [v2] net/intel: add 400G link speed support

[dpdklab at iol.unh.edu]

Test-Label: ai-code-review
Test-Status: SUCCESS
https://dpdk.org/patch/172227

_AI Code Review_

=== Patch Review: series.patch (via Claude) ===
Review date: 2026-10-28

# DPDK Patch Review

## Patch Summary
Adds 400G link speed support to Intel idpf and cpfl PMDs by extending their supported speeds tables.

## Review Findings

### ERRORS

None identified.

### WARNINGS

None identified.

### INFO

**Missing release notes update:**

This patch adds support for a new link speed capability (400G) to two PMDs (idpf and cpfl). This is a user-visible feature enhancement that should be documented in the release notes.

**Suggestion:** Add a release notes entry in `doc/guides/rel_notes/release_26_03.rst` (or appropriate current release file) under the "New Features" section:

```rst
* **Updated Intel idpf and cpfl PMDs.**

  * Added support for 400 Gbps link speed reporting.
```

**Rationale:** While the change is small, it addresses a user-visible defect (400G links reported as "Unknown") and enables a new capability. The DPDK contribution guidelines specify that "Changes to existing API require release notes" and "New drivers or subsystems must have release notes." This falls into the category of enhancing existing PMD capabilities that users will see reflected in the reported link speed.

---

**Code correctness:** The patch correctly:
- Adds the 400G speed entry to both affected drivers' tables
- Includes trailing commas as noted in v2 changelog, following good practice for array maintenance
- Maintains consistency across both PMDs (idpf and cpfl)
- Does not introduce any correctness bugs, resource leaks, or style violations

**Style compliance:** The code changes conform to DPDK coding standards.

Review-Result: CLEAN