Here's a patch which backs out the fix Randy Vinson came up with, and makes
i8259_init() and openpic_hookup_cascade() use setup_irq (tested on LoPEC). 
This also converts the rest of the request_irq callers that were expecting the
old behavior (psurge SMP, chrp xmon, 85xx, some 82xx).  This is more untested,
but looks correct.  I've left 8xx alone in this as it needs other changes
before it would make sense.
Signed-off-by: Tom Rini <trini@kernel.crashing.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>