crocus: assert that 3d samplerview base_array_layer is zero

this codepath will not work on crocus

Reviewed-by: Jason Ekstrand <jason.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15610>

src/gallium/drivers/crocus/crocus_state.c

@@ -2745,6 +2745,10 @@ crocus_create_sampler_view(struct pipe_context *ctx,
    if (tmpl->target != PIPE_BUFFER) {
       isv->view.base_level = tmpl->u.tex.first_level;
       isv->view.levels = tmpl->u.tex.last_level - tmpl->u.tex.first_level + 1;
+
+      /* Hardware older than skylake ignores this value */
+      assert(tex->target != PIPE_TEXTURE_3D || !tmpl->u.tex.first_layer);
+
       // XXX: do I need to port f9fd0cf4790cb2a530e75d1a2206dbb9d8af7cb2?
       isv->view.base_array_layer = tmpl->u.tex.first_layer;
       isv->view.array_len =