Add ini-only "Savedata Upgrade" setting.

Core/Config.cpp

@@ -754,6 +754,7 @@ static ConfigSetting systemParamSettings[] = {
 #endif
 	ConfigSetting("WlanPowerSave", &g_Config.bWlanPowerSave, (bool) PSP_SYSTEMPARAM_WLAN_POWERSAVE_OFF, true, true),
 	ReportedConfigSetting("EncryptSave", &g_Config.bEncryptSave, true, true, true),
+	ConfigSetting("SavedataUpgrade", &g_Config.bSavedataUpgrade, false, true, false),
 
 	ConfigSetting(false),
 };