drm/ttm: remove TTM_MEMTYPE_FLAG_CMA
The original intention was to avoid CPU page table unmaps when BOs move between the GTT and SYSTEM domain. The problem is that this never correctly handled changes in the caching attributes or backing pages. Just drop this for now and simply unmap the CPU page tables in all cases. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/378240/
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c1c440d4
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