[UMP]: header_ops conversion needed for non-ethernet drivers

UML's two non-ethernet drivers need some header_ops conversion.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/um/drivers/slip_kern.c

@@ -31,10 +31,8 @@ void slip_init(struct net_device *dev, void *data)
 	slip_proto_init(&spri->slip);
 
 	dev->init = NULL;
-	dev->header_cache_update = NULL;
-	dev->hard_header_cache = NULL;
-	dev->hard_header = NULL;
 	dev->hard_header_len = 0;
+	dev->header_ops = NULL;
 	dev->addr_len = 0;
 	dev->type = ARPHRD_SLIP;
 	dev->tx_queue_len = 256;

arch/um/drivers/slirp_kern.c

@@ -34,9 +34,7 @@ void slirp_init(struct net_device *dev, void *data)
 
 	dev->init = NULL;
 	dev->hard_header_len = 0;
-	dev->header_cache_update = NULL;
-	dev->hard_header_cache = NULL;
-	dev->hard_header = NULL;
+	dev->header_ops = NULL;
 	dev->addr_len = 0;
 	dev->type = ARPHRD_SLIP;
 	dev->tx_queue_len = 256;