WCN3680 support

[Eugene Krasnikov]

> I check the wcnss base address (0x0300000 is 3660 and 0xfb000000 is 3680)
>

Aha, i think the amount of RAM used by 3680 is 2 Mb more than 3660.

> On my 3660 device I have FW 1.4.1.2 and on 3680 I have 1.5.1.2. Should I
> assume 3680 if FW is 1.5.x.x?

Yeah, why not;) Just cover this with some macro/function just in case
this will be changed in future. Something like or similar:
is_3680()
{
return wcn36xx_is_fw_version_or_higher(1.5.0.0);
}

-- 
Best regards,
Eugene