[clang] [Clang][OpenCL][AMDGPU] Allow a kernel to call another kernel (PR #115821)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

Due to inappropriate behavior from @BukeBeyond, the age of the PR, and the fact that it's merged, I've locked the PR as resolved.

https://github.com/llvm/llvm-project/pull/115821