drm/amdgpu: Remove verify_access shortcut for KFD BOs

This shortcut is no longer needed with access managed properly by KFD.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -165,13 +165,6 @@ static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 {
 	struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 
-	/*
-	 * Don't verify access for KFD BOs. They don't have a GEM
-	 * object associated with them.
-	 */
-	if (abo->kfd_bo)
-		return 0;
-
 	if (amdgpu_ttm_tt_get_usermm(bo->ttm))
 		return -EPERM;
 	return drm_vma_node_verify_access(&abo->tbo.base.vma_node,