[PowerPC] [NFC] Update __float128 tests

Add the two options -ppc-vsr-nums-as-vr and -ppc-asm-full-reg-names to
the __float128 tests. Then modify the tests as required.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336940 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed