[PATCH 3/3] drm/radeon: only enable swiotlb path when need v2

swiotlb expands our card accessing range, but its path always is slower than ttm pool allocation. So add condition to use it. v2: move a bit later Change-Id: I1802645833155a9cd808913f863981173a82145f Signed-off-by: Chunming Zhou Reviewed-by: Monk Liu

[PATCH 3/3] drm/radeon: only enable swiotlb path when need v2

swiotlb expands our card accessing range, but its path always is slower than ttm pool allocation. So add condition to use it. v2: move a bit later Change-Id: I1802645833155a9cd808913f863981173a82145f Signed-off-by: Chunming Zhou Reviewed-by: Monk Liu ---