mt76x0: set max fragments size

Set maximum number of tx fragments according to usb controller
features
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x0/init.c

@@ -722,6 +722,12 @@ int mt76x0_register_device(struct mt76x0_dev *dev)
 	if (ret)
 		return ret;
 
+	/* check hw sg support in order to enable AMSDU */
+	if (mt76u_check_sg(&dev->mt76))
+		hw->max_tx_fragments = MT_SG_MAX_SIZE;
+	else
+		hw->max_tx_fragments = 1;
+
 	mt76x0_init_debugfs(dev);
 
 	return 0;