[clang] [llvm] [Clang][PowerPC] Add DMF crypto builtins for extended mnemonics (PR #185961)

[Maryam Moghadas via cfe-commits]

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maryammo wrote:

As far as I see, target feature error tests for PPC builtins live in `clang/test/CodeGen/PowerPC/`

https://github.com/llvm/llvm-project/pull/185961