Comment 2 for bug 1787993

Tyler Hicks pointed out that Cortex-A57, Cortex-A72, Cortex-A73, and Cortex-A75 all just receive
firmware updates that disabled memory disambiguation at boot time to mitigate SSB. The following page indicates that the patches are only relevant for Cortex-A76. https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability