[llvm] [AArch64] Use vecshiftL64 instead of vecshiftR64 to match scalar SLI imm. (PR #139904)

[David Green via llvm-commits]

https://github.com/davemgreen approved this pull request.

LGTM, but it would be good to remove the instructions that do not do anything.

https://github.com/llvm/llvm-project/pull/139904