[llvm] [WebAssembly] Use generic pseudo_fmin/pseudo_fmax opcodes (PR #208454)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Please double-check my logic -- it's very easy to get confused with these pseudo min/max opcodes, esp. with wasm's extra confusing way of specifying them.

https://github.com/llvm/llvm-project/pull/208454