-tip/master apic related cleanup

On top of

commit dda51106620c328b50007c259b9ef8cea2b7c3d2
Merge: 3391961... a376f30...
Author: Ingo Molnar <[email protected]>
Date: Fri Oct 31 11:03:54 2008 +0100

Merge branch 'x86/cleanups'

Please review. Nothing really serious. Some cleanup work is still in progress. io_apic.c is not touched since Yinghai is working on dyn_irq's.

- Cyrill -