Be a litte bit more paranoid and validate the APIC table before committing to APIC mode.
Be a litte bit more paranoid and validate the APIC table before committing
to APIC mode.

tested by many
ok marco@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars