Freedreno's derived counters combine multiple perfcntrs into a more
sensible, human-friendly metric. This change picks up the counters
currently used in Freedreno's Perfetto producer and rolls them into a
more genericallly usable form.
First place of their use will be through VK_KHR_performance_query, but
the Perfetto producer should also be able to use this interface instead
of having the logic duplicated. For now the counters are available only
for a7xx devices.
Signed-off-by: Zan Dobersek <zdobersek@igalia.com>
Reviewed-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33208>
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