Reduce kernel boot time to <1s on comma 3X

systemd-analyze reports this for the latest AGNOS:

Startup finished in 3.650s (kernel) + 7.343s (userspace) = 10.994s
graphical.target reached after 7.059s in userspace

Get the kernel part of that down to <1s in a self-contained way that doesn't delay the rest of the openpilot.

• can't just defer stuff to later and cost boot time at later stages
• can turn off stuff openpilot doesn't use (NFC, bluetooth, etc.)

AGNOS is built with https://github.com/commaai/agnos-builder