Remove constructor from this library. This library already has SMM CPU I/O 2 in...

Remove constructor from this library.  This library already has SMM CPU I/O 2 in its [Depex], so any module using this library will not be dispatched until the SMM CPU I/O 2 Protocol is installed into the SMM handle database and also copied into the SMM Services Table.

The worker functions in this library have also been updated to simply use the instance of the SMM CPU I/O 2 Protocol that is present in the SMM Services Table.

The dependency on the UEFI Boot Services Table Library has also been removed so the gBS, gST, and gImageHandle symbols will not be automatically linked into an SMM Driver that uses this library.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9999 6f19259b-4bc3-4df7-8a09-765794883524