net: stmmac: Remove WAKE_MAGIC if HW shows no pmt_magic_frame

Remove WAKE_MAGIC from supported modes if the HW capability register
shows no support for pmt_magic_frame.
Signed-off-by: NJisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c

@@ -603,6 +603,8 @@ static void stmmac_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 	mutex_lock(&priv->lock);
 	if (device_can_wakeup(priv->device)) {
 		wol->supported = WAKE_MAGIC | WAKE_UCAST;
+		if (priv->hw_cap_support && !priv->dma_cap.pmt_magic_frame)
+			wol->supported &= ~WAKE_MAGIC;
 		wol->wolopts = priv->wolopts;
 	}
 	mutex_unlock(&priv->lock);