Claude review: PCI/TPH: expose the enabled TPH requester type

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

Patch Review

This is a straightforward accessor:

```c
u8 pcie_tph_enabled_req_type(struct pci_dev *pdev)
{
	return pdev->tph_req_type;
}
EXPORT_SYMBOL(pcie_tph_enabled_req_type);
```

The `!CONFIG_PCIE_TPH` stub returns 0, which matches `PCI_TPH_REQ_DISABLE` (defined as `0x0` in `pci_regs.h`):

```c
static inline u8 pcie_tph_enabled_req_type(struct pci_dev *pdev) { return 0; }
```

Clean and correct. The `EXPORT_SYMBOL` (not `_GPL`) matches the existing `pcie_tph_get_st_table_loc` export convention.

**Nit**: The kdoc says "Return: PCI_TPH_REQ_DISABLE, PCI_TPH_REQ_TPH_ONLY or PCI_TPH_REQ_EXT_TPH" — note that `PCI_TPH_REQ_EXT_TPH` is `0x3` (not `0x2`), so value `0x2` is a gap. The function can technically return any value stored in `tph_req_type`, but the current `pcie_enable_tph` only sets these three. Fine as-is.

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Generated by Claude Code Patch Reviewer