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

[Min-Yih Hsu via llvm-commits]

mshockwave wrote:

> I was just wondering what tests I should be running to verify that I'm not breaking anything, as the ones I have are super basic. The clang test suite maybe?

Usually LLVM's regression tests should be sufficient:
``` shell
$ ninja check-llvm-codegen-m68k
```

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