drm/amdgpu: use kernel BO API for benchmark buffer management

Simplifies the code quite a bit.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2022-02-21 16:01:03 -05:00
commit 5a82b01823