Usually, all the Oprom Firmware are updated through the BIOS itself.
Before proceeding with the BIOS update, these firmware needs to be updated in the following order.
The recommended BIOS and Firmware upgrade method is as follows:
Important: Please be sure to read the instruction files and Release Notes prior to installing any firmware or BIOS.
If you have a backplane HSC, you can do it in the following order: FRUSDR/HSC/BMC/Bios/CMOS clear
Make sure that you read the read me files before updating each firmware.
Let us know how it goes.