radeonsi/nir: Various ARB_enhanced_layout I/O fixes
This gets KHR-GL45.enhanced_layouts.*
passing with radeonsi NIR. The first patch is a generic NIR->LLVM fix and so affects radv too.
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This gets KHR-GL45.enhanced_layouts.*
passing with radeonsi NIR. The first patch is a generic NIR->LLVM fix and so affects radv too.