MdePkg: Add NVMe boot partition header definition

MdePkg: Add NVMe boot partition header definition

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4304

Add NVMe boot partition header definition to NVMe.h
according to NVMe spec 2.0.

Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Weipu Zhu <weipu.zhu@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>