drm/ttm: optimize ttm pool shrinker a bit

Only initialize the DMA coherent pools if they are used.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/414957/
This commit is contained in:
Christian König 2020-11-17 16:35:24 +01:00
commit f987c9e0f5