This patch updates the HTTP boot driver to use the API in UefiBootManagerLib to
create new load option, to avoid duplicate code.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: : Ye Ting <ting.ye@intel.com>
Reviewed-by: : Ni Ruiyu <ruiyu.ni@intel.com>