This patch is to discard the normal ICMP packets and recycle the received ICMP data to avoid the memory leak. Cc: Siyuan Fu <siyuan.fu@intel.com> Cc: Heyi Guo <heyi.guo@linaro.org> Cc: Ye Ting <ting.ye@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com> Tested-by: Heyi Guo <heyi.guo@linaro.org> Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>