ath5k: fix OOB in ath5keepromreadpcalinfo_5111
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 v4.9.311 by commit f4de974019a0adf34d0e7de6b86252f1bd266b06. For more details please see the references link.