[llvm] [X86] Align f128 and i128 to 16 bytes when passing on x86-32 (PR #138092)

[via llvm-commits]

llvmbot wrote:

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Failed to cherry-pick: a78a0f8d204393a0cce367b63395bad90311c1b8

https://github.com/llvm/llvm-project/actions/runs/16537791057

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/138092