CVE-2023-53830

In the Linux kernel, the following vulnerability has been resolved:

platform/x86: think-lmi: Fix memory leak when showing current settings

When retriving a item string with tlmi_setting(), the result has to be
freed using kfree(). In current_value_show() however, malformed
item strings are not freed, causing a memory leak.
Fix this by eliminating the early return responsible for this.