[llvm] [clang] [RISCV] Use BF16 in Xsfvfwmaccqqq intrinsics (PR #71140)

[Yueh-Ting Chen via cfe-commits]

https://github.com/eopXD approved this pull request.

Sorry I did not do this before you.

The patch looks good, I would say we also need tuples of bf16 for completeness. But I will be adding a suite of intrinsics around BFloat16 (https://github.com/riscv-non-isa/rvv-intrinsic-doc/pull/293) so we can probably do that after this landed too.

I would recommend to mention that vector bfloat16 types is introduced in the title of this PR.

https://github.com/llvm/llvm-project/pull/71140