x86/ioapic.c: move lost comment to what seems like appropriate place

The comment got separated from its subject, so move it to what
appears to be the right place, and update to describe the current
structure.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2009-06-08 03:14:59 -07:00
commit 8e13d697fe