Revert "drm/amdgpu: don't attach the tlb fence for SI"

This reverts commit 820b3d3.

It’s better to validate VM TLB flushes in the flush‑TLB backend
rather than in the generic VM layer.

Reverting this patch depends on
commit fa7c231fc2b0 ("drm/amdgpu: validate the flush_gpu_tlb_pasid()")
being present in the tree.

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: prliangpub

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

@@ -1069,9 +1069,7 @@ amdgpu_vm_tlb_flush(struct amdgpu_vm_update_params *params,
 	}
 
 	/* Prepare a TLB flush fence to be attached to PTs */
-	if (!params->unlocked &&
-	    /* SI doesn't support pasid or KIQ/MES */
-	    params->adev->family > AMDGPU_FAMILY_SI) {
+	if (!params->unlocked) {
 		amdgpu_vm_tlb_fence_create(params->adev, vm, fence);
 
 		/* Makes sure no PD/PT is freed before the flush */