[U-Boot] [U-Boot, v6, 01/10] x86: Move table csum into separate file

[Alexander Graf]

> We need the checksum function without all the other table functionality
> soon, so let's split it out into its own C file.
> 
> Signed-off-by: Alexander Graf <agraf at suse.de>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>

Thanks, applied to