aco: Initial subgroups support for Navi
This is some initial work on subgroups support for Navi that was cut from my previous Navi merge request.
Since then, the subgroups shuffle patch has been reworked to fix the issues it had.
This is some initial work on subgroups support for Navi that was cut from my previous Navi merge request.
Since then, the subgroups shuffle patch has been reworked to fix the issues it had.