ACPI: thermal: Use strscpy() instead of strcpy()

strcpy() is generally considered unsafe and use of strscpy() is
recommended [1].

Also using strscpy() instead of strcpy() makes the following checkpatch
warning go away:

	WARNING: Prefer strscpy over strcpy

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strcpy

 [1]
Signed-off-by: Abdul Rahim <abdul.rahim@myyahoo.com>
Link: https://patch.msgid.link/20240913211156.103864-1-abdul.rahim@myyahoo.com


[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>