NAK: [X/Y/Z] ath10k: search SMBIOS for OEM board file extension

[Shrirang Bagul]

Sorry, I will resend with proper subject line.

On Thu, 2017-07-06 at 18:56 +0800, Shrirang Bagul wrote:
> BugLink: https://bugs.launchpad.net/bugs/1666742
> 
> Patches for ath10k driver to read board variant from SMBIOS.
> 
> Patch for Zesty is a clean cherry-pick. Yakkety and Xenial are backports
> only due to difference in context.
> 
> Example:
>  If a default board data file for a specific board is identified by a string
>          "bus=pci,vendor=168c,device=003e,subsystem-vendor=1028,
>                 subsystem-device=0310"
>  then the OEM specific data file, if used, could be identified by variant suffix:
>          "bus=pci,vendor=168c,device=003e,subsystem-vendor=1028,
>                 subsystem-device=0310,variant=DE_1AB"
> 
> If board data file name extension is set but board-2.bin does not contain board
> data file for the variant, the driver will fallback to the default board data
> file not to break backward compatibility.
> 
>