[U-Boot] efi_loader: fix depends on line of EFI_LOADER

[Alexander Graf]

> This line is shown as
> 
>    depends on (ARM64 ||\302\240ARM) && OF_LIBFDT
> 
> on my Emacs.  Use ASCII characters only.
> 
> Assuming it is (ARM64 || ARM), remove the redundancy.
> Unlike Linux, CONFIG_ARM includes CONFIG_ARM64 in U-Boot.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>

Thanks, applied to efi-next

Alex