Merge tag 'efi-2023-01-rc5-2' of https://source.denx.de/u-boot/custodians/u-boot-efi

Merge tag 'efi-2023-01-rc5-2' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2023-01-rc5-2

Documentation:

* Reorganize existing TI docs and add K3 generation page
* Add texinfodocs and infodocs targets
* Update qemu-ppce500 documentation
* Use "changesets" not "csets" in statistics pages

UEFI

* Fix merging of preseeded non-volatile variables
* Fix a return value in the  EFI_HII_DATABASE_PROTOCOL
* Set UEFI specification version to 2.10