Downgrade Linux Kernel version to v5.7 in FireSim

[crsullivan13]

Hello,

I've come across an issue when using FireMarshal inside of FireSim. I would like to downgrade the kernel version from 6.2 to 5.7 as I have a patch that I am struggling to port to version 6.2. I have tried downgrading Linux to the firesim-v57 branch and moving the iceblk and icenet drivers back to commits before mentions of kernel 6.2. My workloads build, but build-root Linux is failing to boot. It gets stuck on "Key type dns_resolver registered". Is there something else that I need to downgrade to get this to work? Is everything too tightly integrated for this to work?