[llvm] [M68k] Introduce more MOVI cases (PR #98377)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ml-opt-dev-x86-64` running on `ml-opt-dev-x86-64-b2` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/137/builds/4561

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: 1200 seconds without output running [b'ninja', b'check-all'], attempting to kill
...
PASS: lit :: xfail-cl.py (54506 of 54519)
PASS: lit :: shtest-not.py (54507 of 54519)
PASS: mlgo-utils :: corpus/extract_ir_test.py (54508 of 54519)
PASS: lit :: max-time.py (54509 of 54519)
PASS: lit :: selecting.py (54510 of 54519)
PASS: LLVM-Unit :: Support/./SupportTests/1/43 (54511 of 54519)
PASS: lit :: shtest-define.py (54512 of 54519)
PASS: lit :: shtest-shell.py (54513 of 54519)
PASS: LLVM :: tools/llvm-reduce/parallel-workitem-kill.ll (54514 of 54519)
PASS: mlgo-utils :: pytype.test (54515 of 54519)
command timed out: 1200 seconds without output running [b'ninja', b'check-all'], attempting to kill
process killed by signal 9
program finished with exit code -1
elapsedTime=1538.434589

```

</details>

https://github.com/llvm/llvm-project/pull/98377