drm/radeon/kms: fix alignment when allocating buffers
We were previously dropping alignment requests on the floor when allocating buffers so we always ended up page aligned. Certain tiling modes on 6xx+ require larger alignment which wasn't happening before. Signed-off-by: NAlex Deucher <alexdeucher@gmail.com> Cc: Jerome Glisse <j.glisse@gmail.com> Signed-off-by: NDave Airlie <airlied@redhat.com>
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