vulkan: Fall back to raw data objects when deserializing if ops == NULL

This can happen if an object is serialized whose object type isn't in
the pipeline cache import ops.  In this case, we generate a raw data
object and plan to turn it into the right object type later.

Fixes: d35e78bb85 ("vulkan/pipeline_cache: Implement deserialize for raw objects")
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16584>

src/vulkan/runtime/vk_pipeline_cache.c

@@ -271,6 +271,9 @@ vk_pipeline_cache_object_deserialize(struct vk_pipeline_cache *cache,
                                      const void *data, size_t data_size,
                                      const struct vk_pipeline_cache_object_ops *ops)
 {
+   if (ops == NULL)
+      ops = &raw_data_object_ops;
+
    if (unlikely(ops->deserialize == NULL)) {
       vk_logw(VK_LOG_OBJS(cache),
               "Pipeline cache object cannot be deserialized");