panfrost: Disable Inf/NaN suppression

We were mostly keeping this around to workaround a glmark bug, but that's really silly. I debugged glmark's shaders and opened a merge request to fix them upstream: https://github.com/glmark2/glmark2/pull/132

With that bit of yak shaving out of the way, we should be able to enable the conformant behaviour ourselves. Cc @icecream95 @Askmewho @bbrezillon