If that ROM is an unencrypted FPGA bitstream (and from the dumps, it certainly doesn't look encrypted), some reverse engineering might be possible. Not sure what value it would have, and reprogramming it would seem sketchy
One difference from the list of cameras so far seems to be the ones with dual pixel AF have the FPGA.
(edit: thanks for the correction Mlapse. The EOS do have dedicated AF points, unlike most P&S)
Disclaimer: I know very little about FPGAs