Merge tag 'efi-2023-01-rc5' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2023-01-rc5

UEFI:

* Improve parameter checking in efi_get_next_variable_name_mem()
* Fix a bugs in management of security database via the eficonfig command

Other:

* Allow sound command to play multiple sounds