aco: combine DPP into VALU
Mostly helps a bunch of Cyberpunk 2077 shaders.
fossil-db (Siena Cichlid):
Totals from 33 (0.02% of 150170) affected shaders:
CodeSize: 106632 -> 101908 (-4.43%)
Instrs: 19399 -> 18215 (-6.10%)
Latency: 292638 -> 291578 (-0.36%)
InvThroughput: 67296 -> 66364 (-1.38%)
Copies: 1776 -> 1777 (+0.06%); split: -0.06%, +0.11%
PreVGPRs: 1499 -> 1475 (-1.60%)