d3d12: Improve perf by stalling the CPU less
No need to wait for irrelevant batches during a map, which would be batches that didn't touch a resource, or if we're just reading, for batches that didn't write to the reosurce.
No need to wait for irrelevant batches during a map, which would be batches that didn't touch a resource, or if we're just reading, for batches that didn't write to the reosurce.