wrote: How can I upgrade to the bootrom 122 so I can upgrade the firmware on the switch to 1121?
You shouldn't care about the BootROM because any update you're going to apply (if it is specified that the BootROM is newer/different with respect the version your Switch is running on) carries the BootROM version it requires for the specific Comware release you're updating to...and so automatically, during the update process, any available software release is able to update the existing BootROM version, if needed.