aco: Fix VOP2 instruction format in visit_tex.

aco: Fix VOP2 instruction format in visit_tex.

There was a v_or_b32 that accidentally used SOP2.
It should use VOP2.

Issue found by looking at a gfxreconstruct trace posted by a user
in this bug: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5838

Cc: mesa-stable
Fixes: 93c8ebfa780ebd1495095e794731881aef29e7d3 "aco: Initial commit of independent AMD compiler"

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15923>