For new PCDs add their usage information strings in UNI file. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: "Yao, Jiewen" <jiewen.yao@intel.com> Cc: Star Zeng <star.zeng@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Qiu Shumin <shumin.qiu@intel.com> Reviewed-by: Star Zeng <star.zeng@intel.com>