Record acpi_madt_x2apic_nmi

struct acpi_madt_x2apic_nmi {
  struct acpi_entry_hdr hdr;
  uacpi_u16 flags;
  uacpi_u32 uid;
  uacpi_u8 lint;
  uacpi_u8[3] reserved;
  /* Full declaration omitted */ 
}