[llvm] [Hexagon] Incorrect MIR after "hexinsert" pass (PR #164021)

[Alexey Karyakin via llvm-commits]

quic-akaryaki wrote:

This does not fix "remark: Misaligned constant address: ...", maybe I should remove "Fixes" or create a separate issue for it?

https://github.com/llvm/llvm-project/pull/164021