net: phylink: add 1000base-KX to phylink_caps_to_linkmodes()

1000base-KX was missed in phylink_caps_to_linkmodes(), add it. This
will be necessary to convert stmmac with xpcs to ensure we don't drop
any supported linkmodes.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phylink.c

@@ -197,6 +197,7 @@ static void phylink_caps_to_linkmodes(unsigned long *linkmodes,
 
 	if (caps & MAC_1000FD) {
 		__set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes);
+		__set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes);
 		__set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes);
 		__set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes);
 	}