InitializeUnicodeCollationSupportWorker mixed the use of Status variable for OpenProt...

InitializeUnicodeCollationSupportWorker mixed the use of Status variable for OpenProtocol and return, it will cause the function to return EFI_SUCCESS even the proper UnicodeCollation is absent. Add ReturnStatus to hold the return status.

Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
(based on FatPkg commit c7046d14e7ebbb03282a5225ed43feee7889a9e9)

[jordan.l.justen@intel.com: Use script to relicense to 2-clause BSD]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Acked-by: Mark Doran <mark.doran@intel.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>