[llvm] [RISCV] Move vendor extensions after standard extensions in RISCVDisassembler::getInstruction16. (PR #130821)

[Sam Elliott via llvm-commits]

lenary wrote:

This will need a rebase, and I think the `XqciFeatureGroup` has to go before the standard extensions now so we decode the hints correctly.

Xqccmp overlaps with Zcmp, but I think everything in Zcmp has a guard (unlike hints), so Xqccmp doesn't need to go before the standard extensions.

https://github.com/llvm/llvm-project/pull/130821