[libclc] libclc: increase fp16 support (PR #98149)

[Fraser Cormack via cfe-commits]

frasercrmck wrote:

@rjodinchr I was about to merge and noticed your email is hidden. I just wanted to check with you whether you want to make it public, as per the discussion https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it/74223/67. AFAICT there's still no official policy, but thought I'd check.

https://github.com/llvm/llvm-project/pull/98149