Pull request efi-2026-03-14 CI: https://source.denx.de/u-boot/custodians/u-boot-efi/-/pipelines/29512 UEFI: * Require at least 128 KiB of stack space to use EFI sub-system. * Avoid buffer overrun in efi_var_restore(). * Avoid superfluous variable store writes on unchanged data * Implement SPI Flash store for EFI variables. * Add an efidebug ecpt sub-command to display the ECPT table and a unit test for the command. Others: * Add missing include string.h to make exception command build again. * lib: uuid: add EBBR 2.1 conformance profile GUID