ir3/nir: Lower indirect references of compact variables
Fixes Sascha Willems "tessellation" demo on Turnip (it contains indirect dereference of tessellation levels).
Fixes: 643f2cb8 ("ir3, tu: Cleanup indirect i/o lowering")
Fixes Sascha Willems "tessellation" demo on Turnip (it contains indirect dereference of tessellation levels).
Fixes: 643f2cb8 ("ir3, tu: Cleanup indirect i/o lowering")