--- bionic --- 
debian/rules needs --enable-arm to enable arm events. I have a test build of the rasdaemon package in ppa:centriq-team/lp1741978-rasdaemon. I tested this on an ARM64 system and confirmed QTI that the output is as expected.

ubuntu@boomer:~$ sudo service rasdaemon status
● rasdaemon.service - RAS daemon to log the RAS events
   Loaded: loaded (/lib/systemd/system/rasdaemon.service; enabled; vendor preset
   Active: active (running) since Thu 2018-04-19 19:21:55 UTC; 26s ago
 Main PID: 4899 (rasdaemon)
    Tasks: 1 (limit: 34406)
   CGroup: /system.slice/rasdaemon.service
           └─4899 /usr/sbin/rasdaemon -f -r

Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Can't get ras:extlog_mem_even
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Can't get traces from ras:aer
Apr 19 19:21:55 boomer rasdaemon[4899]: Can't register mce handler
Apr 19 19:21:55 boomer rasdaemon[4899]: Can't get traces from ras:aer_event
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Listening to events for cpus 
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording mc_event events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording aer_event events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording extlog_event events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording mce_record events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording arm_event events

-- syslog --
Apr 19 19:21:47 boomer systemd[1]: Starting RAS daemon to log the RAS events...
Apr 19 19:21:55 boomer rasdaemon: ras:mc_event event enabled
Apr 19 19:21:55 boomer rasdaemon: ras:mc_event event enabled
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: ras:mc_event event enabled
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Enabled event ras:mc_event
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: ras:aer_event event enabled
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Enabled event ras:aer_event
Apr 19 19:21:55 boomer rasdaemon[4900]: rasdaemon: ras:mc_event event enabled
Apr 19 19:21:55 boomer rasdaemon[4900]: rasdaemon: ras:aer_event event enabled
Apr 19 19:21:55 boomer rasdaemon[4900]: rasdaemon: Can't write to set_event
Apr 19 19:21:55 boomer rasdaemon[4900]: rasdaemon: Can't write to set_event
Apr 19 19:21:55 boomer rasdaemon[4900]: rasdaemon: ras:arm_event event enabled
Apr 19 19:21:55 boomer rasdaemon: Enabled event ras:mc_event
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: ras:arm_event event enabled
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Enabled event ras:arm_event
Apr 19 19:21:55 boomer systemd[1]: Started RAS daemon to log the RAS events.
Apr 19 19:21:55 boomer rasdaemon: ras:aer_event event enabled
Apr 19 19:21:55 boomer rasdaemon: Can't write to set_event
Apr 19 19:21:55 boomer rasdaemon: ras:aer_event event enabled
Apr 19 19:21:55 boomer rasdaemon: Enabled event ras:aer_event
Apr 19 19:21:55 boomer rasdaemon: Can't write to set_event
Apr 19 19:21:55 boomer rasdaemon: ras:arm_event event enabled
Apr 19 19:21:55 boomer rasdaemon: ras:arm_event event enabled
Apr 19 19:21:55 boomer rasdaemon: Enabled event ras:arm_event
Apr 19 19:21:55 boomer rasdaemon: Can't parse /proc/cpuinfo: missing [vendor_id] [cpu family] [model] [cpu MHz] [flags]
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Can't parse /proc/cpuinfo: missing [vendor_id] [cpu family] [model] [cpu MHz] [flags]
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Can't register mce handler
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Can't get ras:extlog_mem_event traces. Perhaps this feature is not supported on your system.
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Can't get traces from ras:aer_event
Apr 19 19:21:55 boomer rasdaemon: Can't register mce handler
Apr 19 19:21:55 boomer rasdaemon: Can't get traces from ras:aer_event
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Listening to events for cpus 0 to 223
Apr 19 19:21:55 boomer systemd[1]: Reloading.
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording mc_event events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording aer_event events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording extlog_event events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording mce_record events
Apr 19 19:21:55 boomer rasdaemon[4899]: rasdaemon: Recording arm_event events
Apr 19 19:21:55 boomer systemd[1]: Starting Initialize EDAC v3.0.0 Drivers For Machine Hardware...
Apr 19 19:21:55 boomer ras-mc-ctl[4943]: ras-mc-ctl: Error: No dimm labels for To be filled by O.E.M. model To be filled by O.E.M.