SecurityPkg: Tcg: New field for User Confirmation Status

SecurityPkg: Tcg: New field for User Confirmation Status

Add a new field in TcgNVS for PP operation user confirmation status,
instead of previous logic overriding Request. Previous logic causes
Get Pending TPM Operation Requested sub function return wrong value.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Yao Jiewen <jiewen.yao@intel.com>
Reviewed-by: Long Qin <qin.long@intel.com>