[llvm] [AArch64][SVE] Support lowering masked loads/stores of <4 x bf16> and <8 x bf16> (PR #208744)

[David Green via llvm-commits]

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

Thanks. Adding bf16 to useSVEForFixedLengthVectorVT in the long run sounds like a good way to go, just not for the branch. LGTM

https://github.com/llvm/llvm-project/pull/208744