[PATCH] powerpc/mpc52xx: Properly update irq_desc when set_type() is called.

[Matt Sealey]

Grant Likely wrote:
> 
> Not entirely; it affects the details about how irqs are handled.
> check_irq_resend() for example.  I don't think any 5200 platforms
> currently care; but it could be an issue with cascaded IRQ handlers.

I'm not sure if that would be a problem or not. Would it shed some light 
on why Efika ATA DMA doesn't work? :)

-- Matt Sealey