[llvm] [GlobalISel] [AArch64] Skip redundant shift amount masking during isel (PR #223136)

[Deepak Shirke via llvm-commits]

deepakshirkem wrote:

>One small thing but if you push a new patch each time it makes it difficult to tell what has changed between revisions. If there is a fixup patch then it is easier to see what has changed and the whole thing doesn't need to be checked again each time.

Done.  Thank You ::)

https://github.com/llvm/llvm-project/pull/223136