I think the most likely culprit is SB_HT_CHAIN_ON_BUS0. Could you change it to 1 in src/mainboard/arima/hdama/Kconfig, make oldconfig, and test?
I've tested it. I get the filo screen now.
Great. I checked that in Rev 5522.
When I do a probe I don't see any IDE device yet. Neither IDE nor SATA SIL3114 drive. This also didn't work for version 4920.
Have you tried SeaBIOS? I haven't used FILO much. In your log it looks like FILO is expecting to find something in your CMOS that it doesn't find.
ERROR: No such CMOS option (boot_devices) menu: hda3:/boot/filo/menu.lst
You could look into that.
Thanks, Myles