/// ## GIC Interrupt Translation Service (ITS) Affinity Structure
///
/// The GIC ITS Affinity Structure provides the association between a GIC ITS and a proximity domain.
/// This enables the OSPM to discover the memory that is closest to the ITS, and use that in allocating its management tables and command queue.
/// The ITS is identified using an ID matching a declaration of a GIC ITS in the MADT.