[llvm] [Hexagon] Implement @llvm.readsteadycounter() (PR #93247)

[Brian Cain via llvm-commits]

androm3da wrote:

> ⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️
> 

I saw these changes from my local git hook and decided against accepting them because it seemed more disruptive than leaving the style as-is.

Could we reformat the entire file(s) in a separate PR?

https://github.com/llvm/llvm-project/pull/93247