x86/tdx: Fix off-by-one in port I/O handling

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-89751 · Microsoft / collected KEV context

cve-program · CVE-2026-89751

• https://git.kernel.org/stable/c/c6875423ad849ac234ab9812eb72f37ff8a490b4
• https://git.kernel.org/stable/c/220011fe95fc78b2bc2d7d43893bc73957a5c811
• https://git.kernel.org/stable/c/222b7005e4519f633b4cd666226256abbab46a1a
• https://git.kernel.org/stable/c/c4a22154870813d10aa0b4c734a574c726f9d4b0
• https://git.kernel.org/stable/c/bb45f705c4440dd3c689328319b88dd28770bbb8
• https://git.kernel.org/stable/c/0f63e656b1c679d32ac595de29d10c03efca6a25

No related operational record is retained in the current change model.