This is also needed for x32 performance work on blacksand board.
A challenge here is that the firmware is 32 bit, so by default we build 64bit binaries for syslinux and grub-efi - which don't run on this system :/
The n450 BSP in meta-intel is in the unfortunate situation of being saddled with 32 bit firmware despite being a 64 bit system. We coud convert this to x86_64, but doing so builds the boot loaders (e.g. grub-efi) as 64 bit, which the EFI shell will not execute, expecting a 32 bit payload. While it may be possible to build the EFI bootloader as a different arch than the target, I don't feel it would be worth the effort to make it 64 bit as the board has a maximum of 2 GB of memory anyway. Closing as WONTFIX.