[llvm] [M68k] implement move to and from sr (PR #111145)

[via llvm-commits]

knickish wrote:

> @knickish Yeah, sorry - my priorities at work got shifted around a bit, so I haven't had the time to look into the tests further. I would definitely like to finish this up though. Currently I'm stuck on trying to figure out how to write an MC test. If you have any pointers to docs or examples, I could probably throw something together quickly.

Understood, will make a PR against your fork then with a test if I can figure it out, and can do what you like with it

https://github.com/llvm/llvm-project/pull/111145