report real I/O APIC ID (0) on MADT and MP-table (v3)

report real I/O APIC ID (0) on MADT and MP-table (v3)

When resetting an I/O APIC, its ID is set to 0, and SeaBIOS doesn't
change it, so report it correctly on the ACPI MADT table and MP-table.

Some hardware may require the BIOS to initialize I/O APIC ID to an
unique value, but SeaBIOS doesn't do that. This patch at least makes the
tables reflect reality.

Changes v2 -> v3:
 - Fix MP-table too, not just ACPI MADT table

Changes v1 -> v2:
 - Cosmetic: whitespace change (removed extra newline)
 - New patch description

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>