[RFC] dove: fix __io() definition to use bus based offset

[Arnd Bergmann]

On Monday 02 August 2010, Arnd Bergmann wrote:
> > Maybe the solution is to have a macro to initialize its entries, which
> > contain the cast to unsigned long for 'virtual' ?
> 
> Yes, that would work, though I would prefer to find a solution that works
> without new macros.

Well, scratch that. On second thought, the macro based solution seems to
have more advantages. arch/arm/mach-bcmring/mm.c already has a variant,
but I think I can come up with a more typesafe version that warns if
you pass in an integer for the virtual address of an MT_DEVICE mapping,
or a pointer for a RAM mapping.

	Arnd