Boot: Initialize Wii root before saving SYSCONF file

Fixes netplay and movie overrides of SYSCONF settings not applying.

Source/Core/Core/ConfigLoaders/BaseConfigLoader.h

@@ -4,16 +4,19 @@
 
 #pragma once
 
+#include <functional>
 #include <memory>
 
 namespace Config
 {
 class ConfigLayerLoader;
 enum class LayerType;
+struct Location;
 }  // namespace Config
 
 namespace ConfigLoaders
 {
-void SaveToSYSCONF(Config::LayerType layer);
+void SaveToSYSCONF(Config::LayerType layer,
+                   std::function<bool(const Config::Location&)> predicate = {});
 std::unique_ptr<Config::ConfigLayerLoader> GenerateBaseConfigLoader();
 }  // namespace ConfigLoaders