drm/amdgpu: remove tlb flush in amdgpu_gtt_mgr_recover

At this point the gart is not set up, there's no point to invalidate tlb
here and it could even be harmful.

Signed-off-by: Yunxiang Li <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 		amdgpu_ttm_recover_gart(node->base.bo);
 	}
 	spin_unlock(&mgr->lock);
-
-	amdgpu_gart_invalidate_tlb(adev);
 }
 
 /**