[X86] Don't pass ParitySrc array into isAddSubOrSubAddMask. Instead use a bool output parameter to get the real piece of info we care about. NFC

The ParitySrc array is more of an implementation detail. A single bool to get the final parity is sufficient.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333935 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed