[llvm] [TableGen] Suppress per-HwMode duplicate instructions/tables. (PR #82567)

[Jason Eckhardt via llvm-commits]

nvjle wrote:

> @nvjle You may [request a commit access](https://llvm.org/docs/DeveloperPolicy.html#obtaining-commit-access) if you are going to contribute more. :-)

:100:  Definitely plan to soon-- a few more commits still needed..

https://github.com/llvm/llvm-project/pull/82567