[llvm] [M68k] Handle 16 bit MOVs to and from CCR (PR #114714)

[via llvm-commits]

knickish wrote:

@glaubitz Thanks, much appreciated. I updated the title as requested. 

How are you testing these? I set up a [docker container chroot thing](https://github.com/knickish/m68k_tests) based on your guide on the debian forums, but it's pretty unwieldy to be honest

https://github.com/llvm/llvm-project/pull/114714