[U-Boot] [U-Boot, v6, 02/10] x86: Move smbios generation into arch independent directory

[Alexander Graf]

> We will need the SMBIOS generation function on ARM as well going forward,
> so let's move it into a non arch specific location.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Thanks, applied to