aco: don't combine precise max(min()) to med3

fossil-db (Navi):
Totals from 241 (0.18% of 137413) affected shaders:
CodeSize: 856280 -> 856308 (+0.00%); split: -0.00%, +0.00%
Instrs: 164220 -> 164514 (+0.18%); split: -0.00%, +0.18%
Cycles: 1031916 -> 1033092 (+0.11%); split: -0.00%, +0.11%
VMEM: 77855 -> 78514 (+0.85%); split: +0.85%, -0.01%
SMEM: 20501 -> 20593 (+0.45%); split: +0.46%, -0.01%
Copies: 9791 -> 9790 (-0.01%); split: -0.03%, +0.02%

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7045>
(cherry picked from commit d4c821da0e5924c6604b63dc923b3e8541e1f3aa)
3 files changed