You can try updating iDRAC firmware using iDRAC GUI. Steps are mentioned in below post [URL]#M5946   As you have very old iDRAC FW I suggest not to directly update 2.92. Instead you can try staged update with some intermediate versions and reach 2.92.  
Hello! Updating all the software on my R710 rev 2 today. Bios is currently 6.6.0 and LifeCycle Controller is 1.7.5. iDRAC is 1.80 right now, I want to update to 2.92, the latest. However I'm getting "The update package is not compatible with your system" when running the BIN downloaded from here . I tried updating to 1.85 first, but this got me Typeset: not found. Running Ubuntu 20.04 LTS. Any help would be appreciated! Thanks!
IDRAC6 Update device is not compatible