- Add intel_vtd.rs module with DMAR parsing, DRHD discovery,
register definitions, and basic unit initialization
- Update iommu daemon discovery to detect both AMD-Vi (IVRS)
and Intel VT-d (DMAR) units
- Update IommuScheme to track both amd_units and intel_units
- Intel VT-d init: version check, capability read, disable
translation, report supported features (QI, IR, EIM)
Full DMA remapping enablement (root table, context entries,
page tables, command buffer) remains as TODO for follow-up.
vasilito
ac2f1ccbc2