[llvm] [WebAssembly] Lower fmuladd to madd and nmadd (PR #161355)

[Jasmine Tang via llvm-commits]

https://github.com/badumbatish approved this pull request.

LGTM overall i just have a question on the truncate and extending for f16 based operations, we should wait for another reviewer

https://github.com/llvm/llvm-project/pull/161355