drm/amdgpu: Remove duplicate setting of ->need_swiotlb

There's no need to set this before the number of DMA bits has been
properly determined.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Thierry Reding 2018-02-20 11:44:50 +01:00 • committed by Alex Deucher
commit 421334a847