serial: sunsab: Fix error handling in sunsab_init()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.9.337 by commit 5ea80d3dc0e59c597d803dc603532ccc54e431db, it was introduced in version v2.6.18 by commit c4d37215a824820e1b614ff9f6969af72cd953f4. For more details please see the references link.