Revert "ac: generate FMA for inexact instructions for radeonsi"

This reverts commit 4b9370cb0f3a2d9030e827f847f66bdefeaf08fd.

Fixes: 4b9370cb0f3a2d9030e827f847f66bdefeaf08fd
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3429

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6284>
4 files changed