Set the user data of interrupt counters to the interrupt vector number used for the interrupt.  Makes the vmstat -i output similar to what we see on i386.
Set the user data of interrupt counters to the interrupt vector number used
for the interrupt.  Makes the vmstat -i output similar to what we see on
i386.

ok deraadt@, krw@

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