[llvm] [PowerPC] Move the `PowerPC VSX FMA Mutation` pass ahead of the `Register Coalescer pas`s when the -schedule-ppc-vsx-fma-mutation-early option is enabled. (PR #111696)

[zhijian lin via llvm-commits]

https://github.com/diggerlin edited https://github.com/llvm/llvm-project/pull/111696