[Xenial][Pull] Update new Qualcomm Atheros QCA6174 firmware

[Seth Forshee]

On Tue, Sep 13, 2016 at 04:18:05PM +0800, Phidias Chiang wrote:
> Firmware for this card isn't in the current linux-firmware package.
> Latest upstream firmware is also tested but doesn't work either.
> 
> Qualcomm has upstreamed a new firmware to support this module. It has
> been tested and solve the issue.

What repository did you cherry pick the commit from? It wasn't upstream,
so we need to add the url to the changelog (having the sha-1 without
knowing what repo it came from isn't very useful).

I'm assuming we should add this firmware to yakkety as well?

Thanks,
Seth