[clang] [llvm] [RISCV] Update Zvzip support to v0.2 (PR #210603)

[Pengcheng Wang via cfe-commits]

wangpc-pp wrote:

Please hold this PR for a while because we don't know what the final spec will be like. There are some discussions in https://github.com/riscv/riscv-isa-manual/pull/3233, let's wait for the ARC and @ptomsich.

https://github.com/llvm/llvm-project/pull/210603