stmmac: review the wake-up support

If the PM support is available this is passed
through the platform instead to be hard-coded
in the core files.
WoL on Magic Frame can be enabled by using
the ethtool support.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 1d8baf7..d66c617 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -37,6 +37,7 @@
 	int enh_desc;
 	int tx_coe;
 	int bugged_jumbo;
+	int pmt;
 	void (*fix_mac_speed)(void *priv, unsigned int speed);
 	void (*bus_setup)(void __iomem *ioaddr);
 #ifdef CONFIG_STM_DRIVERS