aco: set TRUNC_COORD=0 for nir_texop_tg4

aco: set TRUNC_COORD=0 for nir_texop_tg4

Fixes black squares in Assassin's Creed: Valhalla and rendering of
FidelityFX-CACAO demo.

fossil-db (sienna cichlid):
Totals from 3052 (2.09% of 146267) affected shaders:
SpillSGPRs: 8437 -> 8646 (+2.48%)
CodeSize: 30993832 -> 31116916 (+0.40%); split: -0.00%, +0.40%
Instrs: 5869934 -> 5886783 (+0.29%); split: -0.00%, +0.29%
Latency: 250330521 -> 250463770 (+0.05%); split: -0.00%, +0.05%
InvThroughput: 59797617 -> 59814584 (+0.03%); split: -0.00%, +0.03%
VClause: 92114 -> 92132 (+0.02%)
SClause: 197373 -> 197338 (-0.02%); split: -0.02%, +0.01%
Copies: 479482 -> 482394 (+0.61%); split: -0.01%, +0.61%
Branches: 219629 -> 219635 (+0.00%)
PreSGPRs: 248970 -> 249366 (+0.16%)

fossil-db (polaris10):
Totals from 3050 (2.06% of 147787) affected shaders:
SGPRs: 282864 -> 282912 (+0.02%); split: -0.01%, +0.02%
VGPRs: 242572 -> 242612 (+0.02%)
SpillSGPRs: 10387 -> 10675 (+2.77%)
CodeSize: 31872460 -> 31996128 (+0.39%)
MaxWaves: 10924 -> 10925 (+0.01%)
Instrs: 6222217 -> 6239072 (+0.27%)
Latency: 317482545 -> 317773685 (+0.09%); split: -0.00%, +0.09%
InvThroughput: 156149624 -> 156242072 (+0.06%); split: -0.00%, +0.06%
VClause: 92295 -> 92254 (-0.04%); split: -0.05%, +0.01%
SClause: 243342 -> 243321 (-0.01%); split: -0.01%, +0.00%
Copies: 678902 -> 681700 (+0.41%); split: -0.00%, +0.41%
Branches: 219698 -> 219703 (+0.00%)
PreSGPRs: 244251 -> 244644 (+0.16%)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Fixes: 58f25098a0d ("radv: Use TRUNC_COORD on samplers")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3110
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10036>