[clang] [llvm] [ARM] enable FENV_ACCESS pragma support for hard-float targets (PR #137101)

[Erik Enikeev via llvm-commits]

Varnike wrote:

Made fixes based on comments. Also corrected lowering of `STRICT_F16_TO_FP` and `STRICT_FP_TO_F16`.

>Yeah that might be useful - so we can add this part before turning the whole feature on. There are some strict-fp vector operations that could theoretically be supported - I'm not sure yet if they are very worth adding or not.

For review convenience, I’ve left the changes here for now. If everything looks good, I’ll create a separate PR and revert this one to its original state.

https://github.com/llvm/llvm-project/pull/137101