Re: [PATCH v2] mt76: mt7921: introduce 160 MHz channel bandwidth support

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Since 80p80MHz is not supprted in mt7921, we should not register
this
capability to mac80211. When the feature coming, we may have a
new
config cap.has_bw80p80 to adapte the new flow.

Then, how to tell 80p80M and 160M apart with only checking
IEEE80211_STA_RX_BW_160? 

 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz
 *	(including 80+80 MHz)

Maybe move has_bw80p80 into mt7921_dev as it is not generic to me?

As you noted, both 80p80M and 160M are included in
IEEE80211_STA_RX_BW_160. We may not check two features
by IEEE80211_STA_RX_BW_160 only. That is why I prefer to have
.has_bw160 and .has_80p80 at next stage.

With the new feature, HW should report different result in the flow
of 
chip capability check. The check point should start from
mt76_connac_mcu_parse_XXXX_cap() and then we can know the real
capabilities of this HW chip.

What about using device id? I think we can easily determine the BW
without adding .has_xx in to common core, and it looks more like a 7921specific stuff though.