UEFI messages on startup

[Simon Glass]

Hi,

I see these messages on startup with a rpi_4 - what can we do about
this? It happens on every boot.

** File not found ubootefi.var **
Failed to load EFI variables
** Unable to write file ubootefi.var **
Failed to persist EFI variables
** Unable to write file ubootefi.var **
Failed to persist EFI variables
** Unable to write file ubootefi.var **
Failed to persist EFI variables
** Unable to write file ubootefi.var **
Failed to persist EFI variables
** Unable to write file ubootefi.var **
Failed to persist EFI variables
** Booting bootflow '<NULL>' with efi_mgr
Loading Boot0000 'mmc 0' failed
Loading Boot0001 'usb 0' failed
EFI boot manager: Cannot load any image

Regards,
Simon