amdxc: Support FSR 4.0.2 #296
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This MR allows the FSR SDK 2.0.0 to automatically use FSR 4.0.2 whenever the hardware supports it. On RDNA 3, this currently requires using the wmma workaround env to get things to work correctly. However, it may be possible to get rid of this restriction in the future.
A point of potential issues could be the usage of some AMD d3d12 extension headers that were accidentally released under the MIT license. However, I thought they would be fine for inclusion since it's MIT license and not FSR4 source code itself. (Also these headers have been modified heavily from the original form of course)