x86: use generic per-device dma coherent allocator
Signed-off-by: NDmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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Signed-off-by: NDmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>