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.
This gets KHR-GL45.enhanced_layouts.*
passing with radeonsi NIR. The first patch is a generic NIR->LLVM fix and so affects radv too.