Claude review: platform/x86/intel/vsec: Decouple add/link helpers from PCI

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

**Overall: Good refactor, clean separation.**

This removes the `struct pci_dev *pdev` parameter from `intel_vsec_add_aux()` and `intel_vsec_link_devices()`, replacing them with `struct device *parent`. The key safety addition is:

```c
if (!dev_is_pci(parent))
    return 0;
```

in `intel_vsec_link_devices()`, which correctly short-circuits the dependency-tracking logic (which relies on PCI ID matching) for non-PCI devices. The dependency/linking machinery is only relevant to the VSEC PCI driver's own probe path, so returning 0 for non-PCI parents is correct.

The `vsec_tpmi.c` caller update from `vsec_dev->pcidev` to `&vsec_dev->pcidev->dev` is correct given that at this point in the series, `pcidev` still exists.

No issues found.

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