Merge tag 'efi-2026-01-rc2' of https://git.u-boot-project.org/u-boot/custodians/u...

Pull request efi-2026-01-rc2

CI: https://git.u-boot-project.org/u-boot/custodians/u-boot-efi/-/pipelines/753

Documentation:

* sandbox: fix enum host_platform_flags description
* switch from setenv to env set and from printenv to env print
* document Renesas R-Car Gen5 RSIP Cortex-R52 start
* thead: lpi4a: detail how to enable fastboot

UEFI:

* unify and correct GUID selection for security database variables
* test: check default GUID selection of security database variables
* set correct frame buffer address
* check efi_deserialize_load_option() in get_dp_device()

diff --cc doc/android/avb2.rst
Simple merge