Merge tag 'efi-2026-01-rc4' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2026-01-rc4

CI: https://source.denx.de/u-boot/custodians/u-boot-efi/-/pipelines/28652

Documentation:

* Correct and add missing pytest hook script environment variable names
* board: verdin-am62p: Fix boot log output
* Add a page for downloading the U-Boot logo with and without text

UEFI:

* Fix a memory leak when retrieving device paths from boot vars