RPi5 users should update their bootloader firmware

[graysky]

Take note that some (maybe all?) RPi5s running with older firmware in the bootloader may see tons of lines in journalctl like these:

Jan 14 09:00:51 phobos kernel: raspberrypi-firmware soc@107c000000:firmware: Request 0x00030087 returned status 0x00000000
Jan 14 09:00:51 phobos kernel: raspberrypi-firmware soc@107c000000:firmware: Request 0x00038087 returned status 0x00000000
Jan 14 09:00:51 phobos kernel: raspberrypi-firmware soc@107c000000:firmware: Request 0x00030087 returned status 0x00000000

To prevent this, simply update the firmware and reboot:

The current rpi5-eeprom package supplies the tool and firmware you need. Once installed just run:
# rpi-eeprom-update -a
# reboot