wifi: mt76: mt7996: set correct value in beamforming mcu command for mt7992

Configure correct bf number and bitmap in beamforming mcu command for
mt7992 chipsets, which only support dual-band.

Signed-off-by: Howard Hsu <howard-yh.hsu@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>

Author: haogroot

drivers/net/wireless/mediatek/mt76/mt7996/mcu.c

@@ -3930,8 +3930,9 @@ int mt7996_mcu_set_txbf(struct mt7996_dev *dev, u8 action)
 
 		tlv = mt7996_mcu_add_uni_tlv(skb, action, sizeof(*req_mod_en));
 		req_mod_en = (struct bf_mod_en_ctrl *)tlv;
-		req_mod_en->bf_num = 3;
-		req_mod_en->bf_bitmap = GENMASK(2, 0);
+		req_mod_en->bf_num = mt7996_band_valid(dev, MT_BAND2) ? 3 : 2;
+		req_mod_en->bf_bitmap = mt7996_band_valid(dev, MT_BAND2) ?
+					GENMASK(2, 0) : GENMASK(1, 0);
 		break;
 	}
 	default: