IntelFsp2WrapperPkg SecFspWrapperPlatformSecLibSample:Update code to pass build

IntelFsp2WrapperPkg SecFspWrapperPlatformSecLibSample:Update code to pass build

1. Update its library class to PlatformSecLib
2. Update source code to refer to the matched header file

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Giri Mudusuru <giri.p.mudusuru@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>