nir/divergence_analysis: Fix load_view_index divergence in VS

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28573>

src/compiler/nir/nir_divergence_analysis.c

@@ -358,6 +358,8 @@ visit_intrinsic(nir_intrinsic_instr *instr, struct divergence_state *state)
          is_divergent = false;
       else if (stage == MESA_SHADER_FRAGMENT)
          is_divergent = !(options & nir_divergence_single_prim_per_subgroup);
+      else
+         is_divergent = true;
       break;
    case nir_intrinsic_load_fs_input_interp_deltas:
       assert(stage == MESA_SHADER_FRAGMENT);