[PATCH] ath10k: implement drv_get_tsf for ibss merging

[Yeoh Chun-Yeow]

> Yeah, this extremely ugly but don't really know any better way to handle
> this now.

I have observed that we have ath10k_wmi_event_tsf_measurement_report,
but no so sure how to trigger this event.

> But why do you need to take conf_mutex? Isn't this enough:
>
> +static u64 ath10k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
> +{
> +       /*
> +        * FIXME: Return 0 for time being. Need to figure out whether FW
> +        * has the API to fetch 64-bit TSF
> +        */
> +
> +       return 0;
> +}

Ya, I think this is enough for time being. I will submit v2 on this.

-----
Chun-Yeow