[llvm] [InstCombine] lshr (mul (X, 2^N + 1)), N -> add (X, lshr(X, N)) (PR #90295)

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AtariDreams wrote:

> @AtariDreams why do you keep force pushing patches? The github UI doesn't make it easy to see if you changed anything in the code in the patch or just rebased. If you don't write any comment to explain the what you did, the reviewer is left guessing.

Edited the commit message is what I did.

https://github.com/llvm/llvm-project/pull/90295