REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4092
To comply with coding style rule each library class
should have its own header even if it is just a private child library
instance consumed by parent public library in the same package.
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>