mt76: mt7915: introduce mt7915_mcu_beacon_check_caps()

Beacon elements might be changed by hostapd configuraion, so driver
should compare both IEs and PHY capabilities to get the least common
denominator before association.
Co-developed-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/main.c

@@ -253,6 +253,7 @@ static int mt7915_add_interface(struct ieee80211_hw *hw,
 	vif->offload_flags |= IEEE80211_OFFLOAD_ENCAP_4ADDR;
 
 	mt7915_init_bitrate_mask(vif);
+	memset(&mvif->cap, -1, sizeof(mvif->cap));
 
 out:
 	mutex_unlock(&dev->mt76.mutex);

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -116,12 +116,24 @@ struct mt7915_sta {
 	} twt;
 };
 
+struct mt7915_vif_cap {
+	bool ldpc:1;
+	bool vht_su_ebfer:1;
+	bool vht_su_ebfee:1;
+	bool vht_mu_ebfer:1;
+	bool vht_mu_ebfee:1;
+	bool he_su_ebfer:1;
+	bool he_su_ebfee:1;
+	bool he_mu_ebfer:1;
+};
+
 struct mt7915_vif {
 	u16 idx;
 	u8 omac_idx;
 	u8 band_idx;
 	u8 wmm_idx;
 
+	struct mt7915_vif_cap cap;
 	struct mt7915_sta sta;
 	struct mt7915_phy *phy;