switch m68k to use the generic remapping DMA allocator v2

From: Christoph Hellwig
Date: Tue Jun 25 2019 - 05:01:41 EST

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Hi Geert,

can you take a look at the (untested) patches below? They convert m68k
to use the generic remapping DMA allocator, which is also used by
arm64 and csky.

Changes since v2:
- fix kconfig dependencies to properly build on sun3
- updated a patch description to better explain why we are doing this

Next message: Christoph Hellwig: "[PATCH 1/2] m68k: use the generic dma coherent remap allocator"
Previous message: Linus Walleij: "Re: [PATCH 2/2] drivers: gpio: amd-fch: drop unused pdev pointer in privata data"
Next in thread: Christoph Hellwig: "[PATCH 1/2] m68k: use the generic dma coherent remap allocator"
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