Today's implementation of handling HOOK_BEFORE and HOOK_AFTER is
a bit complex. More comments is better.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Fan Jeff <vanjeff_919@hotmail.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>