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 v4.14.276 by commit ed3dfdaa8b5f0579eabfc1c5818eed30cfe1fe84. For more details please see the references link.