Introduce two public functions CharToUpper and AsciiCharToUpper. They have the same functions as InternalCharToUpper and InternalBaseLibAsciiToUpper.Considering the internal functions will be removed,so directly I change their function names to the public ones'. https://bugzilla.tianocore.org/show_bug.cgi?id=1369 Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com>