Add the EFI-specific commands: chain, configuration, efi-autoresizecons,
efi-seed-entropy, efi-set/efi-show/efi-unset, fdt, gop, halt, lsefi,
memmap, mode, netserver, poweroff, uga, plus an arm64-only note for
cache_flags.
Assisted-by: Claude Code (Sonnet 5)
Sponsored by: Netflix