[U-Boot] [U-Boot,v2,2/8] efi: Use asmlinkage for EFIAPI

[Alexander Graf]

> This is required for x86 and is also correct for ARM (since it is empty).
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>

Thanks, applied to