[PATCH] [Power] Add a new feature flag for support of the sync instruction

[Bill Schmidt]

As I stated, I do not know what the intent of generic is.  But "ppc" is also a "generic" 32-bit processor and has the same description otherwise.  Why do you leave FeatureSYNC off of it?  It seems to my vague understanding that they should be the same.

http://reviews.llvm.org/D5316