sky2: enable IRQ on duplex renegotiation

Don't want IRQ on FIFO error because there is nothing useful to do with it.
But do want IRQ on duplex change.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/net/sky2.h

@@ -1149,7 +1149,7 @@ enum {
 	PHY_M_IS_JABBER		= 1<<0, /* Jabber */
 
 	PHY_M_DEF_MSK		= PHY_M_IS_LSP_CHANGE | PHY_M_IS_LST_CHANGE
-				 | PHY_M_IS_FIFO_ERROR,
+				 | PHY_M_IS_DUP_CHANGE,
 	PHY_M_AN_MSK	       = PHY_M_IS_AN_ERROR | PHY_M_IS_AN_COMPL,
 };