[llvm] [RISCV] Fix schedule info for Zqvdotq (PR #142717)

[Min-Yih Hsu via llvm-commits]

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

Agree that we can split out a separate SchedWrite in the future if there is such a need.

https://github.com/llvm/llvm-project/pull/142717