MdeModulePkg: Remove unsupported PcdExpression usage in module INF

MdeModulePkg: Remove unsupported PcdExpression usage in module INF

https://bugzilla.tianocore.org/show_bug.cgi?id=442

PcdExpression used in INF to control PCD and Source is unsupported feature.
Current sample usage in module INF brings confuse.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>