[X86] Add 64 bit pattern matching for PSADBW

PSADBW pattern currently supports the 32 bit IR pattern and only GLT (greather than) comparison.
The patch extends the pattern to catch also 64 bit IR pattern and includes all other comparison types (not only GLT).

Differential Revision: https://reviews.llvm.org/D31577

llvm-svn: 299425