Re: support range based offsets in dma-direct v3

I've pulled this into the dma-mapping for-next tree. Thanks Jim and everyone helping out!

support range based offsets in dma-direct v3

Hi all, this series adds range-based offsets to the dma-direct implementation. The guts of the change are a patch from Jim with some modifications from me, but to do it nicely we need to ARM patches to prepare for it as well. Changes since v2: - fix a mismerge - return (phys_addr_t)-1 from tra