[llvm] [RISCV][NFC] Remove VRRegMO of tryAddHint (PR #85755)

[Craig Topper via llvm-commits]

topperc wrote:

With https://github.com/llvm/llvm-project/pull/85982 I am able to hit these assertions with Zdinx on RV32.

https://github.com/llvm/llvm-project/pull/85755