platform/x86: thinkpad-acpi: replace strcpy with strscpy

platform/x86: thinkpad-acpi: replace strcpy with strscpy

strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors.[1]

[1]: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy

Signed-off-by: Nitin Joshi <nitjoshi@gmail.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://lore.kernel.org/r/20250107021507.4786-1-nitjoshi@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>