mt76: mt7615: register ext_phy if DBDC is detected

MT_EE_WIFI_CONF field can be used to detect if the chipset is MT7615D.
Thus, add support to automatically register ext_phy if DBDC is detected.
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c

@@ -125,6 +125,9 @@ mt7615_eeprom_parse_hw_band_cap(struct mt7615_dev *dev)
 	case MT_EE_2GHZ:
 		dev->mt76.cap.has_2ghz = true;
 		break;
+	case MT_EE_DBDC:
+		dev->dbdc_support = true;
+		/* fall through */
 	default:
 		dev->mt76.cap.has_2ghz = true;
 		dev->mt76.cap.has_5ghz = true;

drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h

@@ -278,6 +278,7 @@ struct mt7615_dev {
 
 	bool fw_debug;
 	bool flash_eeprom;
+	bool dbdc_support;
 
 	spinlock_t token_lock;
 	struct idr token;

drivers/net/wireless/mediatek/mt76/mt7615/pci_init.c

@@ -25,6 +25,9 @@ static void mt7615_init_work(struct work_struct *work)
 	mt7615_phy_init(dev);
 	mt7615_mcu_del_wtbl_all(dev);
 	mt7615_check_offload_capability(dev);
+
+	if (dev->dbdc_support)
+		mt7615_register_ext_phy(dev);
 }
 
 static int mt7615_init_hardware(struct mt7615_dev *dev)