Convert klp module callbacks tests into livepatch module tests

kernel test robot noticed the following build errors:

[auto build test ERROR on shuah-kselftest/next]
[also build test ERROR on shuah-kselftest/fixes linus/master v6.6 next-20231110]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use ‘–base’ as documented in
git-scm.com/docs/git-format-patch#_base_tree_information]

url: github.com/intel-lab-lkp/linux/commits/Petr-Mladek/livepatch-Add-callbacks-for-introducing-and-removing-states/20231111-014906
base: git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
patch link: lore.kernel.org/r/20231110170428.6664-6-pmladek%40suse.com
patch subject: [POC 5/7] livepatch: Convert klp module callbacks tests into livepatch module tests
config: s390-defconfig (download.01.org/0day-ci/archive/20231111/[email protected]/config)
compiler: s390-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (download.01.org/0day-ci/archive/20231111/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

>> make[5]: *** No rule to make target ‘lib/livepatch/test_klp_speaker2.o’, needed by ‘lib/livepatch/’.
>> make[5]: *** No rule to make target ‘lib/livepatch/test_klp_speaker_livepatch2.o’, needed by ‘lib/livepatch/’.
make[5]: *** [scripts/Makefile.build:243: lib/livepatch/test_klp_speaker.o] Error 1
make[5]: *** [scripts/Makefile.build:243: lib/livepatch/test_klp_speaker_livepatch.o] Error 1
make[5]: Target ‘lib/livepatch/’ not remade because of errors.

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