Kernel/USB: Update SysFS from the generic hub instead of from UHCI

Author: https://github.com/Lubrsi
Commit: 4b4525dfc7
Pull-request: https://github.com/SerenityOS/serenity/pull/9394
Reviewed-by: https://github.com/supercomputer7

Kernel/Bus/USB/USBHub.h

@@ -102,6 +102,8 @@ private:
     USBHubDescriptor m_hub_descriptor;
 
     Device::List m_children;
+
+    void remove_children_from_sysfs();
 };
 
 }