drm/i915: Fix -Wstringop-overflow warning in call to intelreadwm_latency()
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 v4.19.246 by commit fa6d61db00701167255f01174a382cdf6193b2b1. For more details please see the references link.