drivers/net/wan: remove exceptional & on function name

In this file, function names are otherwise used as pointers without &.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r@
identifier f;
@@

f(...) { ... }

@@
identifier r.f;
@@

- &f
+ f
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/wan/dscc4.c

@@ -1127,7 +1127,7 @@ static int dscc4_open(struct net_device *dev)
         init_timer(&dpriv->timer);
         dpriv->timer.expires = jiffies + 10*HZ;
         dpriv->timer.data = (unsigned long)dev;
-        dpriv->timer.function = &dscc4_timer;
+	dpriv->timer.function = dscc4_timer;
         add_timer(&dpriv->timer);
 	netif_carrier_on(dev);