nir/constant_folding: Use the standard variable naming convention

Typically, if we have one alu instruction, we call it "alu" and if we
have one intrinsic we call it "intrin".

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7366>
1 file changed