[PATCH] Power-specific fastisel test case updates for VSX

[Bill Schmidt]

These changes are harmless and will help keep the failure list down as we work on enabling VSX.  As discussed in http://reviews.llvm.org/D5362, true VSX support for FastISel is planned, at which time VSX-specific tests (or variants of these tests) will be added.  The patch LGTM -- I'll plan to commit on Bill Seurer's behalf tomorrow night if nobody objects.

http://reviews.llvm.org/D5778