[llvm] [RISCV][NFC] Add generateMCInstSeq in RISCVMatInt (PR #84462)

[Sacha Coppey via llvm-commits]

Zeavee wrote:

Hi,

I fixed the imports by using `MCRegister.h` as suggested.

I sadly do not have write access. Now that this pull request is approved, can someone please commit it on my behalf?

Thank you!

https://github.com/llvm/llvm-project/pull/84462