driconf: Use DRI_CONF_OPT_I for remaining int options

Now that we have a single range in the option and start==end means "no
range", we can switch over these non-ranged int options.  This will ease
later refactors.

Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6916>
2 files changed