e1000e: Return 1 instead of a non-zero value for link up indication

A number of users have mentioned they have tools that rely on a link-up
indication having a return value of 1 rather than a non-zero value.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/e1000e/ethtool.c

@@ -177,7 +177,7 @@ static u32 e1000_get_link(struct net_device *netdev)
 	u32 status;
 
 	status = er32(STATUS);
-	return (status & E1000_STATUS_LU);
+	return (status & E1000_STATUS_LU) ? 1 : 0;
 }
 
 static int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)