ac/nir: use ac_emit_fdiv throughout

... and eliminate emit_fdiv and nir_to_llvm_context::fpmath_md_*, which
are now unused.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
1 file changed