MIPS: Extend DMA_MAYBE_COHERENT logic to DMA_NONCOHERENT use
Setting DMA_MAYBE_COHERENT gives a platform the opportunity to select use of cache ops at boot. Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Patchwork: https://patchwork.linux-mips.org/patch/6575/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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