REF:https://bugzilla.tianocore.org/show_bug.cgi?id=814 This commit updates the IPMI related header files. Cc: Younas Khan <pmdyounaskhan786@gmail.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>