parisc: Changes to ref refs/heads/parisc

Rebased ref, commits from common ancestor:
commit 1540d86c4809e58cc11fab0e61dd60d4c304f27a

Author: Kyle McMartin <[email protected]>
Date:   Wed Oct 13 21:00:55 2010 -0400

parisc: lay groundwork for killing __do_IRQ

Use proper accessors and handlers for generic irq cleanups. We just call back into __do_IRQ through desc->handler now, and remove the explicit calls.