cxl: Fix kobject memory leak in cxl_sysfs_afu_new_cr()

[Markus Elfring]

>>> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/coding-style.rst?id=f359287765c04711ff54fbd11645271d8e5ff763#n465
>> I just used the original author's label, should I replace all his labels
>> like'err','err1' with reasonable one.
>
> No.

Do you insist to deviate from the current Linux coding style?

Regards,
Markus