[llvm] [RISCV] Update SpacemiT-X60 vector fixed-point arithmetic latencies (PR #150517)

[Mikhail R. Gadelha via llvm-commits]

mikhailramalho wrote:

@mshockwave I have updated the ReleaseAtCycles with data from the camel-cdr page. May I ask for another review?

https://github.com/llvm/llvm-project/pull/150517