Fix HPS1x64 and HPS2x64's usage of Vulkan

It would be nice if someone could fix HPS1x64 and HPS2x64's usage of Vulkan. HPS1x64's usage of Vulkan causes the emulated game to have black overlaying the video output of the game. HPS2x64's usage of Vulkan causes an error mentioning "VULKAN ERROR: Problem creating compute pipelines.". Their source code can be found at https://github.com/Zero3K/hpsx64. I am running them on a device that has an Intel Iris Xe integrated graphics chip.