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Vulkan: Fix GPU hangs on AMD Polaris #4924
It appears that our usage of primitive restart is causing issues on AMD hardware, I'm guessing maybe due to the combination of base vertex plus primitive restart.
This PR disables primitive restart on AMD drivers (it might be okay on radv though, so we probably need a way to differentiate these two drivers).
Thanks to @iwubcode for painfully testing silly ideas for this bug.