This patch update the shell ping command to use timer service to calculate the RTT time, instead of using the timer arch protocol. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Zhang Lubo <lubo.zhang@intel.com> Cc: Ni Ruiyu <ruiyu.ni@intel.com> Cc: Ye Ting <ting.ye@intel.com> Cc: Fu Siyuan <siyuan.fu@intel.com> Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>