drm/amdgpu: use ktime rather than jiffies for benchmark results

To protect against wraparounds.

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 16:32:09 -05:00
commit 4683af148f