[U-Boot] [U-Boot, v4, 14/21] efi_loader: Move to compiler based target architecture determination

[Alexander Graf]

> Thanks to CONFIG_SANDBOX, we can not rely on config options to tell us
> what CPU architecture we're running on.
> 
> The compiler however does know that, so let's just move the ifdefs over
> to compiler based defines rather than kconfig based options.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>

Thanks, applied to efi-next

Alex