[SPARC64]: Fix reset handling in VNET driver.

In vnet_event(), if the channel was reset, try to get the link
going again by invoking vio_port_up() after dropping the lock.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/sunvnet.c

@@ -498,6 +498,8 @@ static void vnet_event(void *arg, int event)
 		vio_link_state_change(vio, event);
 		spin_unlock_irqrestore(&vio->lock, flags);
 
+		if (event == LDC_EVENT_RESET)
+			vio_port_up(vio);
 		return;
 	}