[llvm] [SYCL] Add platform enumeration and info query using liboffload (PR #166927)

[Alexey Bader via llvm-commits]

bader wrote:

> I'd like to define naming style for the upstreaming code base.
> 
> LLVM guide has no requirements about file names so I suggest:
> 
> 1. all file names under `libsycl` folder (.h, .cpp, .md, etc) will be in snake_case (no exceptions)
> 2. SYCL API type names - follow SYCL2020 spec naming - snake_case
> 3. all detail (excluding STL-like types) types to use CamelCase.
> 

@KseniyaTikhomirova, please, create a libsycl/docs/CodingGuidelines.rst file and put your suggestion there. Let's separate this discussion from adding SYCL platform.

> changes comparing to impl/llvm: 

What is impl/llvm? Do you mean intel/llvm repository?


https://github.com/llvm/llvm-project/pull/166927