[clang] [RISCV] Add missing intrinsicis vrgatherei16/vslideup/vslidedown support for Zvfbfhmin (PR #146309)

[Jim Lin via cfe-commits]

tclin914 wrote:

> LLVM IR intrinsicis for vrgatherei16/vslideup/vslidedown have been supported.

Sorry, I found LLVM IR intrinsicis for vrgatherei16/vslideup/vslidedown actually haven't been supported.

https://github.com/llvm/llvm-project/pull/146309