Firmware need to disconnect the client connection when host's message overlow the receive buffer in firmware. We emulate this behavior in backend service. Signed-off-by: Liu Shuo <shuo.a.liu@intel.com> Reviewed-by: Li Hao <hao.l.li@intel.com> Reviewed-by: Wang Yu <yu1.wang@intel.com> Reviewed-by: Zhao, Yakui <yakui.zhao@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>