[llvm] [PowerPC] fixed issue "Failure to optimize (x == 0) ? 0xFF : 0 to addic+subfe instead of cntlzw+srwi+neg" (PR #190606)

[Lei Huang via llvm-commits]

================

----------------
lei137 wrote:

nit:

```suggestion
      SDValue Addc = DAG.getNode(PPCISD::ADDC, dl, DAG.getVTList(VT, MVT::i32),
```

https://github.com/llvm/llvm-project/pull/190606