Begin modifying the PB92 config file to actually generate a flashable,
bootable image.

The kernel has to fit inside an 896KiB area in a 4MB SPI flash.
So a bunch of stuff can't be included (and more is to come), including
(unfortunately) IPv6.

TODO:

• GPIO modules need to be created
• Shrink the image a bit more by removing some of the CAM layer debugging strings.