rename XXXDflt to XXXDefault (expand for better readability)
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com>
    Reviewed-by: "Mudusuru, Giri P" <giri.p.mudusuru@intel.com>
    
    
    
    git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16835 6f19259b-4bc3-4df7-8a09-765794883524