Merge tag 'efi-2026-07-rc6' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2026-07-rc6

CI: https://source.denx.de/u-boot/custodians/u-boot-efi/-/pipelines/30505

Documentation:

* bootdev: fix typos
* board: renesas: Document Renesas RZ/N1D and RZ/N1S as arm
* board: renesas: Document Renesas Geist board support
* board: renesas: Document Renesas Gray Hawk board support
* board: renesas: Document Renesas Ironhide board support
* android: fastboot: Document halt behaviour

UEFI:

* fix memory leak in efi_var_collect()
* set revision field in block IO protocol
* fix guid comparison in efi_selftest_loaded_image.c
* fix use-after-free in efi_selftest_memory.c