radv: Always enable PERFECT_ZPASS_COUNTS.

radv: Always enable PERFECT_ZPASS_COUNTS.

We have an issue with early depth testing and discard, where
non-perfect counts count the tile if the early depth test succeeds.

We could spend a lot of effort to set this conditionally based
on the presence of the two conditions, but in the presence of
inherited queries let's try this first.

Changing PERFECT_ZPASS_COUNTS since I'm pretty sure this has a lower
performance impact than always using late depth testing.

CC: <mesa-stable@lists.freedesktop.org>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3218
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5757>